What is the unit of wavelength ?

What is the unit of wavelength ?
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unit of wavelength m
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Hertz is a unit for measuring – (1) Intensity of waves (2) Frequency of waves (3) Wavelength (4) Clarity of waves

Description : Hertz is a unit for measuring – (1) Intensity of waves (2) Frequency of waves (3) Wavelength (4) Clarity of waves

Last Answer : (2) Frequency of waves

Hertz is a unit for measuring (1) Intensity of waves (2) Frequency of waves (3) Wavelength (4) Clarity of waves

Description : Hertz is a unit for measuring (1) Intensity of waves (2) Frequency of waves (3) Wavelength (4) Clarity of waves

Last Answer : Frequency of waves

The S.I unit of wavelength is

Description : The S.I unit of wavelength is

Last Answer : The S.I unit of wavelength is Angstroms (Å)

The number of cycles per unit time is called _________ A. Period B. Frequency C. Amplitude D. Wavelength

Description : The number of cycles per unit time is called _________ A. Period B. Frequency C. Amplitude D. Wavelength

Last Answer : B. Frequency

What is the unit of light wavelength? ∙ a. Micrometer ∙ b. Angstroms ∙ c. Mils ∙ d. Fathom

Description : What is the unit of light wavelength? ∙ a. Micrometer ∙ b. Angstroms ∙ c. Mils ∙ d. Fathom

Last Answer : ∙ b. Angstroms

What is the relationship between wave velocity and wavelength ?

Description : What is the relationship between wave velocity and wavelength ?

Last Answer : The relation is , we know , the number of full vibrations completed in 1 second is called frequency. Again , the distance traveled by a wave during 1 full vibration is called the wavelength. So if the wavelength ... traveled by the wave = f This is the wave velocity v. Thus wave velocity , v = f

What is the wavelength of visible light ?

Description : What is the wavelength of visible light ?

Last Answer : : Light wavelengths range from 0.00038 mm to 0.0008 mm.

What is the wavelength ?

Description : What is the wavelength ?

Last Answer : Wave length is the distance between two consecutive particles of a wave.

What is the wavelength of visible spectrum?

Description : What is the wavelength of visible spectrum?

Last Answer : – 3900-7600 A

The wavelength of X-rays is of the order of howmany angstrom?

Description : The wavelength of X-rays is of the order of howmany angstrom?

Last Answer : – 1 Angstrom

What is the relation between wavelength, frequency and velocity? (1) velocity of wave = frequency * wavelength (2) velocity of wave = frequency/wavelength (3) velocity of wave = wavelength/frequency (4) None of above

Description : What is the relation between wavelength, frequency and velocity? (1) velocity of wave = frequency * wavelength (2) velocity of wave = frequency/wavelength (3) velocity of wave = wavelength/frequency (4) None of above

Last Answer : a) velocity of wave = frequency * wavelength

The wavelength at which the peak of intensity of blackbody radiation Occurs – (1) increases with increase in temperature (2) decreases with increase in temperature (3) is the same at all temperatures (4) does not follow any pattern as temperature changes

Description : The wavelength at which the peak of intensity of blackbody radiation Occurs – (1) increases with increase in temperature (2) decreases with increase in temperature (3) is the same at all temperatures (4) does not follow any pattern as temperature changes

Last Answer : (2) decreases with increase in temperature Explanation: According to Wien's displacement law, when the temperature of a blackbody radiator increases, the overall radiated energy increases. ... to its temperature. Shorter-wavelength (higher-frequency) light corresponds to higherenergy photons.

Indicate the correct arrangement for electromagnetic radiation in order of their increasing wavelength. (1) Microwave, infrared, visible. X-rays (2) X-rays, visible, infrared, microwave (3) Visible, infrared, microwave, X-rays (4) X-rays, infrared, visible, microwave

Description : Indicate the correct arrangement for electromagnetic radiation in order of their increasing wavelength. (1) Microwave, infrared, visible. X-rays (2) X-rays, visible, infrared, microwave (3) Visible, infrared, microwave, X-rays (4) X-rays, infrared, visible, microwave

Last Answer : (4) X-rays, infrared, visible, microwave Explanation: The Electromagnetic spectrum in order of decreasing energy, thus increasing wavelength : Gamma Rays-wavelength: 0.01 nm ; X-rays -1 nm ; Ultra-violet Rays-0.1 ... -10 m ; and Very High Frequency (VHF) and Ultra High Frequency (UHF): 10 m-10 cm.

An electron microscope gives higher magnification than an optical microscope, because: (1) It uses more powerful lenses (2) the velocity of electron is smaller than that of visible (3) the electrons have more energy than the light particles (4) the wavelength of electrons is smaller as compared to the wavelength of visible light

Description : An electron microscope gives higher magnification than an optical microscope, because: (1) It uses more powerful lenses (2) the velocity of electron is smaller than that of visible (3) the ... particles (4) the wavelength of electrons is smaller as compared to the wavelength of visible light

Last Answer : (4) the wavelength of electrons is smaller as compared to the wavelength of visible light Explanation: An electron microscope uses a beam of electrons to illuminate a specimen and produce a ... photons. Magnification is the process of enlarging something only in appearance, not in physical size.

An electron microscope gives higher magnifications than an optical microscope because – (1) The velocity of electrons is smaller than that of light (2) The wavelength of electrons is smaller as compared to the wavelength of visible light (3) The electrons have more energy than the light particulars (4) The electron microscope uses more powerful lenses

Description : An electron microscope gives higher magnifications than an optical microscope because - (1) The velocity of electrons is smaller than that of light (2) The wavelength of electrons is smaller as ... have more energy than the light particulars (4) The electron microscope uses more powerful lenses

Last Answer : (2) The wavelength of electrons is smaller as compared to the wavelength of visible light Explanation: An electron microscope is a microscope that uses a beam of accelerated electrons as a spume ... a higher resolving power than a light microscope and can reveal the structure of smaller objects.

Red is used as an emergency or danger signal as – (1) it is a striking colour (2) its wavelength is the longest (3) it is scattered (4) it has very high energy

Description : Red is used as an emergency or danger signal as – (1) it is a striking colour (2) its wavelength is the longest (3) it is scattered (4) it has very high energy

Last Answer : (2) its wavelength is the longest Explanation: The effect of scattering is inversely related to the fourth power of the wavelength of a colour. Red has the highest wavelength of all the colours and is able to travel the longest distance through fog, rain, and the alike.

A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an (1) Audible wave (2) Infrasonic wave (3) Ultrasonic wave (4) Microwave

Description : A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an (1) Audible wave (2) Infrasonic wave (3) Ultrasonic wave (4) Microwave

Last Answer : (1) Audible wave

The device used for measuring the wavelength of X-rays is – (1) G.M. Counter (2) Cyclotron (3) Bragg Spectrometer (4) Mass Spectrometer

Description : The device used for measuring the wavelength of X-rays is – (1) G.M. Counter (2) Cyclotron (3) Bragg Spectrometer (4) Mass Spectrometer

Last Answer : (3) Bragg Spectrometer Explanation: Bragg Spectrometer is an instrument used to analyze crystal structure by using X-rays. In it, a beam of collimated X-rays strikes the crystal, and a detector measures the angles and intensities of the reflected beam.

Which, of the following radiations has the least wavelength? (1) X-rays (2) a-rays (3) g-rays (4) b-rays

Description : Which, of the following radiations has the least wavelength? (1) X-rays (2) a-rays (3) g-rays (4) b-rays

Last Answer : (3) g-rays Explanation: X-rays - smaller than 10 nano metre gamma- rays - 0.0005 to 0.1 nano metre alpha-rays - 125 nano metre

Loudness of sound depends on – (1) Frequency (2) Wavelength (3) Amplitude (4) Pitch

Description : Loudness of sound depends on – (1) Frequency (2) Wavelength (3) Amplitude (4) Pitch

Last Answer : (3) Amplitude Explanation: Loudness depends on the amplitude of the sound wave. The larger the amplitude the more energy the sound wave contains therefore the louder the sound. The pitch of a note depends on the frequency of the source of the sound.

If an electron and a photon have the same wavelength, then they will have the same – (1) velocity (2) linear momentum (3) angular momentum (4) energy

Description : If an electron and a photon have the same wavelength, then they will have the same – (1) velocity (2) linear momentum (3) angular momentum (4) energy

Last Answer : (2) linear momentum Explanation: When a non-relativistic electron and a non-relativistic proton are moving and have the same de Broglie wavelength, then they will have the same linear mo-mentum p = mv.

Which among the following determines the pitch of a sound? (1) Amplitude (2) Frequency (3) Loudness (4) Wavelength

Description : Which among the following determines the pitch of a sound? (1) Amplitude (2) Frequency (3) Loudness (4) Wavelength

Last Answer : (2) Frequency Explanation: The pitch of a sound is determined by the frequency of vibration of the sound waves So higher the frequency the higher is the pitch.

Which of the following property of sound is affected by change in air temperature – (1) Frequency (2) Intensity (3) Amplitude (4) Wavelength

Description : Which of the following property of sound is affected by change in air temperature – (1) Frequency (2) Intensity (3) Amplitude (4) Wavelength

Last Answer : (4) Wavelength Explanation: The wavelength of sound changes with temperature. This is because the speed of sound changes with the temperature. Since the speed of sound is different at different temperature, this ... while the same tone in fresh water at 68°F would have a wavelength of 48.05 feet.

Sound and light waves both _______. (1) have similar wavelength (2) obey the laws of reflection (3) travel as longitudinal waves (4) travel through vacuum

Description : Sound and light waves both _______. (1) have similar wavelength (2) obey the laws of reflection (3) travel as longitudinal waves (4) travel through vacuum

Last Answer : (2) obey the laws of reflection Explanation: The two laws of reflection of light are applicable to sound waves as well. The incident wave, the normal to the reflecting surface and the reflected wave at the point of incidence lie in the same plane.

Of the following properties of a wave, the one that is independent of the other is its (1) amplitude (2) velocity (3) wavelength (4) frequency

Description : Of the following properties of a wave, the one that is independent of the other is its (1) amplitude (2) velocity (3) wavelength (4) frequency

Last Answer : (1) amplitude Explanation: The maximum extent of a vibration or oscillation, measured from the position of equilibrium.

The loudness of sound depends upon (1) Velocity (2) Pitch (3) Amplitude (4) Wavelength

Description : The loudness of sound depends upon (1) Velocity (2) Pitch (3) Amplitude (4) Wavelength

Last Answer : (3) Amplitude Explanation: Loudness is the characteristic of a sound that is primarily a psychological correlate of physical strength (amplitude).

When a light wave is reflected from a mirror, there is a change in its – (1) frequency (2) amplitude (3) wavelength (4) velocity

Description : When a light wave is reflected from a mirror, there is a change in its – (1) frequency (2) amplitude (3) wavelength (4) velocity

Last Answer : (2) amplitude Explanation: When a light wave is reflected from an object, it changes not only its amplitude but also its phase according to the properties of the object at a particular point. The velocity and momentum are just reversed in another direction.

Red light is used for signals because it has – (1) long wavelength (2) high intensity (3) high frequency (4) low refraction in the medium

Description : Red light is used for signals because it has – (1) long wavelength (2) high intensity (3) high frequency (4) low refraction in the medium

Last Answer : (1) long wavelength Explanation: Red is the international colour of stop signs and stop lights on highways and intersections because it is scattered the least by air molecules. The effect of scattering is ... the colours and is able to travel the longest distance through fog, rain, and the alike.

The sky appears blue because of – (1) Atmospheric water vapour (2) Scattering of light (3) Reflection on sea water (4) Emission of blue wavelength by the sun

Description : The sky appears blue because of – (1) Atmospheric water vapour (2) Scattering of light (3) Reflection on sea water (4) Emission of blue wavelength by the sun

Last Answer : (2) Scattering of light Explanation: The sky is blue because the molecules in the air scatter light in the higher wavelengths (that is, the blue light), while lower wavelength light (that is ... reflected down from the scattering is blue, therefore a blue sky. This is called Rayleigh scattering.

Of the following properties of a wave, the one that is independent of the other is its (1) amplitude (2) velocity (3) wavelength (4) frequency

Description : Of the following properties of a wave, the one that is independent of the other is its (1) amplitude (2) velocity (3) wavelength (4) frequency

Last Answer : a) amplitude Explanation: The maximum extent of a vibration or oscillation, measured from the position of equilibrium.

Bolometer is used to measure – (1) Frequency (2) Temperature (3) Velocity (4) Wavelength

Description : Bolometer is used to measure – (1) Frequency (2) Temperature (3) Velocity (4) Wavelength

Last Answer : (2) Temperature Explanation: A bolometer is a device for measuring the power of incident electromagnetic radiation via the heating of a material with a temperature-dependent electrical resistance. IL was ... , connected to a thermal reservoir (a body of constant temperature) through a thermal link.

What is the wavelength of visible spectrum? (1) 1300 A° -3000 A° (2) 3900 A° - 7600 A° (3) 7800 A° - 8000 A° (4) 8500 A° - 9800 A°

Description : What is the wavelength of visible spectrum? (1) 1300 A° -3000 A° (2) 3900 A° - 7600 A° (3) 7800 A° - 8000 A° (4) 8500 A° - 9800 A°

Last Answer : (2) 3900 A° - 7600 A° Explanation: The visible spectrum is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye. Electromagnetic radiation in this range of wavelengths ... from about 390 to 750 nm in terms of angstrom it is in between 3900 - 7600 A°.

The distance between node and adjacent antinodes is 30 cm. The wavelength is - (1) 30 cm. (2) 90 cm. (3) 120 cm. (4) 60 cm.

Description : The distance between node and adjacent antinodes is 30 cm. The wavelength is - (1) 30 cm. (2) 90 cm. (3) 120 cm. (4) 60 cm.

Last Answer : (4) 60 cm. Explanation: A node is a point along a standing wave where the wave has minimal amplitude. The opposite of a node is an anti-node, a point where the amplitude of the standing wave is a maximum.

A decibel is – (1) A musical instrument (2) The wavelength of noise (3) A musical note (4) A measure of sound level

Description : A decibel is – (1) A musical instrument (2) The wavelength of noise (3) A musical note (4) A measure of sound level

Last Answer : (4) A measure of sound level Explanation: The decibel (dB) is a logarithmic unit that indicates the ratio of a physical quantity (usually power or intensity) relative to a specified or implied reference ... ratio in decibels is ten times the logarithm to base 10 of the ratio of two power quantities.

Time taken to complete a revolution around a planet is called A. orbital period B. time period C. frequencyD. wavelength

Description : Time taken to complete a revolution around a planet is called A. orbital period B. time period C. frequency D. wavelength

Last Answer :  time period

A wave of frequency 1 GHz has wavelength of A. 0.4 m B. 0.5 m C. 0.2 m D. 0.3 m

Description : A wave of frequency 1 GHz has wavelength of A. 0.4 m B. 0.5 m C. 0.2 m D. 0.3 m

Last Answer : 0.3 m

In FM, frequency of modulated wave varies with A. amplitude B. time C. wavelength D. energy

Description : In FM, frequency of modulated wave varies with A. amplitude B. time C. wavelength D. energy

Last Answer : time

At separation between a node and antinode, wavelength becomes A. λ B. λ⁄2 C. λ⁄4 D. 2λ

Description : At separation between a node and antinode, wavelength becomes A. λ B. λ⁄2 C. λ⁄4 D. 2λ

Last Answer : λ⁄4

A color with a wavelength longer than that of yellow is: w) red x) blue y) violet z) green

Description : A color with a wavelength longer than that of yellow is: w) red x) blue y) violet z) green

Last Answer : ANSWER: W -- RED

A wavelength is commonly measured in which one of the following units? w) radians x) angstroms y) electron volts z) seconds

Description : A wavelength is commonly measured in which one of the following units? w) radians x) angstroms y) electron volts z) seconds

Last Answer : ANSWER: X -- ANGSTROMS

As a source of sound approaches a stationary listener, the apparent wavelength: w) increases x) decreases y) stays the same.

Description : As a source of sound approaches a stationary listener, the apparent wavelength: w) increases x) decreases y) stays the same. 

Last Answer : ANSWER: X -- DECREASES

Light has wavelength, frequency, and speed. Which, if any, of these quantities remains unchanged when light passes from a vacuum into a block of glass?

Description : Light has wavelength, frequency, and speed. Which, if any, of these quantities remains unchanged when light passes from a vacuum into a block of glass?

Last Answer : ANSWER: FREQUENCY

A beam of light is incident on a large block of glass. The index of refraction of the glass is greater than one. Is the wavelength of the light in the glass: w) longer than x) shorter than y) the same as the wavelength of the light in the air?

Description : A beam of light is incident on a large block of glass. The index of refraction of the glass is greater than one. Is the wavelength of the light in the glass: w) longer than x) shorter than y) the same as the wavelength of the light in the air?

Last Answer : ANSWER: X -- SHORTER THAN 

Enrichment of uranium by gaseous diffusion relies on the fact that uranium-235 diffuses through holes in the barriers more readily than uranium-238 does because uranium-235 is: w) a different chemical compound. x) a different wavelength. y) resistant to magnetism. z) slightly lighter than uranium-238.

Description : Enrichment of uranium by gaseous diffusion relies on the fact that uranium-235 diffuses through holes in the barriers more readily than uranium-238 does because uranium-235 is: w) a different chemical ... x) a different wavelength. y) resistant to magnetism. z) slightly lighter than uranium-238.

Last Answer : ANSWER: Z -- SLIGHTLY LIGHTER THAN URANIUM-238.

What is the WAVELENGTH of the carrier wave, in meters, of a radio station which is broadcasting at a frequency of 100 megahertz?

Description : What is the WAVELENGTH of the carrier wave, in meters, of a radio station which is broadcasting at a frequency of 100 megahertz? 

Last Answer : ANSWER: 3 METERS

What is the wavelength in millimeters of a sound wave whose frequency is 35 KILOHERTZ. Assume the speed of sound is 350 METERS PER SECOND? w) 100 millimeters x) 1,000 millimeters y) 10 millimeters z) 1/10 millimeters

Description : What is the wavelength in millimeters of a sound wave whose frequency is 35 KILOHERTZ. Assume the speed of sound is 350 METERS PER SECOND? w) 100 millimeters x) 1,000 millimeters y) 10 millimeters z) 1/10 millimeters

Last Answer : ANSWER: Y -- 10 MILLIMETERS 

What is the DeBroglie wavelength of a 1,200 kilogram corvette traveling at a rate of 25 meters per second? Planck's constant is equal to 6.62 x 10-34 Joule-seconds. w) 5.3 x 10-32 meters x) 5.9 x 10-34 meters y) 2.1 x 10-38 meters z) 1.6 x 10-40 meters

Description : What is the DeBroglie wavelength of a 1,200 kilogram corvette traveling at a rate of 25 meters per second? Planck's constant is equal to 6.62 x 10-34 Joule-seconds. w) 5.3 x 10-32 meters x) 5.9 x 10-34 meters y) 2.1 x 10-38 meters z) 1.6 x 10-40 meters

Last Answer : ANSWER: Y -- 2.1 x 10-38 METERS

A small hole in a sheet of aluminum foil is used to diffract yellow light both under water and in a vacuum. Which is true? w) light diffracts less in the water because its wavelength is larger. x) light diffracts less in the water because its wavelength is smaller. y) light diffracts more in the water because its wavelength is larger. z) light diffracts more in the water because its wavelength is smaller.

Description : A small hole in a sheet of aluminum foil is used to diffract yellow light both under water and in a vacuum. Which is true? w) light diffracts less in the water because its wavelength is ... because its wavelength is larger. z) light diffracts more in the water because its wavelength is smaller.

Last Answer : ANSWER: X -- LIGHT DIFFRACTS LESS IN THE WATER BECAUSE ITS WAVELENGTH IS SMALLER

A typical microwave oven produces microwave radiation with a wavelength of: w) 3 meters x) 3 x 10-2 meters (read: 3 times 10 to the minus 2 meters) y) 3 x 10 -6 meters (read: 3 times 10 to the minus 6 meters) z) 3 x 10-9 meters (read: 3 times 10 to the minus 9 meters)

Description : A typical microwave oven produces microwave radiation with a wavelength of: w) 3 meters x) 3 x 10-2 meters (read: 3 times 10 to the minus 2 meters) y) 3 x 10 -6 meters (read: 3 times 10 to the minus 6 meters) z) 3 x 10-9 meters (read: 3 times 10 to the minus 9 meters) 

Last Answer : ANSWER: X -- 3 x 10-2 METERS

What is a typical wavelength of an AM radio wave? w) 3000 meters x) 300 meters y) 30 meters z) 3 meters

Description : What is a typical wavelength of an AM radio wave? w) 3000 meters x) 300 meters y) 30 meters z) 3 meters

Last Answer : ANSWER: X -- 300 METERS