A beam of white light is passed through a diffraction grating and the resulting spectrum is allowed to fall on a screen. Which one of the following is the color of light that undergoes the greatest deviation from its original direction. Is it: w) red x) yellow y) blue z) violet

A beam of white light is passed through a diffraction grating and the resulting spectrum is allowed to fall on a screen. Which one of the following is the color of light that undergoes the greatest deviation from its original direction. Is it: w) red x) yellow y) blue z) violet
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ANSWER: W -- RED
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A beam of white light is passed through a diffraction grating and the resulting spectrum is allowed to fall on a screen. Which one of the following is the color of light that undergoes the greatest deviation from its original direction? Is it: A. Red B. yellow C. Blue D. violet Engineering

Description : A beam of white light is passed through a diffraction grating and the resulting spectrum is allowed to fall on a screen. Which one of the following is the color of light that undergoes the greatest deviation from its original direction? Is it: A. Red B. yellow C. Blue D. violet Engineering

Last Answer : A. Red

When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is - (1) the violet ray (2) the red ray (3) the green ray (4) the blue ray

Description : When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is - (1) the violet ray (2) the red ray (3) the green ray (4) the blue ray

Last Answer : (2) the red ray Explanation: Red is deviated the least and violet the most.

When white light is passed through a double slit which of the following statements is TRUE: w) Each of the bright bands is dispersed into a spectrum x) Only the central band is dispersed into a spectrum y) All the bright bands except the central one are dispersed into a spectrum z) Each band has a single color different from its neighboring bands

Description : When white light is passed through a double slit which of the following statements is TRUE: w) Each of the bright bands is dispersed into a spectrum x) Only the central band is dispersed into ... one are dispersed into a spectrum z) Each band has a single color different from its neighboring bands 

Last Answer : ANSWER: Y -- ALL THE BRIGHT BANDS EXCEPT THE CENTRAL ONE ARE DISPERSED INTO THE SPECTRUM

Which colour of light shows maximum deviation when passed through a prism? (1) Red (2) Green (3) Violet (4) Yellow

Description : Which colour of light shows maximum deviation when passed through a prism? (1) Red (2) Green (3) Violet (4) Yellow

Last Answer : (3) Violet Explanation: When passed through a prism violet colour of light shows maximum deviation. As white light passes through a prism, the voilet component, having the minimum wave length observes the maximum refractive index for the prism and, thus, gets deviated to the maximum extent.

Which colour of light shows maximum deviation when passed through a prism ? (1) Red (2) Green (3) Violet (4) Yellow

Description : Which colour of light shows maximum deviation when passed through a prism ? (1) Red (2) Green (3) Violet (4) Yellow

Last Answer : Violet

Which colour of light shows maximum deviation when passed through a prism? (1) White (2) Red (3) Violet (4) Green

Description : Which colour of light shows maximum deviation when passed through a prism? (1) White (2) Red (3) Violet (4) Green

Last Answer : (3) Violet Explanation: The angle of deviation, by which the light of a particular wavelength gets deviated on passing through a medium, depends upon the refractive index of the medium, as ... wavelength. The smaller the wavelength of the passing light, the greater is the refractive index observed.

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

Which color light has the highest frequency? w) green x) violet y) red z) yellow

Description : Which color light has the highest frequency? w) green x) violet y) red z) yellow

Last Answer : ANSWER: X -- VIOLET

When a beam of ordinary white light is passed through a Polaroid plate filter, the intensity of the beam that emerges is: w) equal to that of the incident beam x) about 0.9 that of the incident beam y) about one-half that of the incident beam z) practically zero

Description : When a beam of ordinary white light is passed through a Polaroid plate filter, the intensity of the beam that emerges is: w) equal to that of the incident beam x) about 0.9 that of the incident beam y) about one-half that of the incident beam z) practically zero

Last Answer : ANSWER: Y -- ABOUT ONE-HALF THAT OF THE INCIDENT BEAM 

Which of the following colors of visible light has the longest wavelength? Is it: w) violet x) green y) yellow z) red

Description : Which of the following colors of visible light has the longest wavelength? Is it: w) violet x) green y) yellow z) red

Last Answer : ANSWER: Z -- RED

What is the highest order spectrum which may be seen with monochromatic light of wavelength 5000 A0by means of diffraction grating with 5000 lines/cm? A. 2 B. 4 C. 8 D. 16

Description : What is the highest order spectrum which may be seen with monochromatic light of wavelength 5000 A0by means of diffraction grating with 5000 lines/cm? A. 2 B. 4 C. 8 D. 16

Last Answer : B. 4

The Doppler Effect predicts that the spectrum of light from a visible body moving AWAY from the Earth will experience a shift in frequency when viewed from Earth. This particular shift is known as the: w) Blue shift x) Neutral shift y) Red shift z) Dirac shift

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Last Answer : ANSWER: Y -- RED SHIFT

The region of the electromagnetic spectrum immediately above the frequencies to which the human eye is sensitive is called: w) ir x) ultra-violet y) rf z) gamma ray

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Last Answer : ANSWER: X -- ULTRA-VIOLET

The wave nature of light is demonstrated by which of the following? w) the photoelectric effect x) color y) the speed of light z) diffraction

Description : The wave nature of light is demonstrated by which of the following? w) the photoelectric effect x) color y) the speed of light z) diffraction

Last Answer : ANSWER: Z -- DIFFRACTION

Four identical samples of a metal are heated to different temperatures. Based on the colors of their incandescences, which sample is the hottest? The sample that is: w) blue-white x) bright red y) yellow z) orange

Description : Four identical samples of a metal are heated to different temperatures. Based on the colors of their incandescences, which sample is the hottest? The sample that is: w) blue-white x) bright red y) yellow z) orange

Last Answer : ANSWER: W -- BLUE-WHITE

Of the following, the most energetic form of NON-IONIZING radiation is: w) ultra-violet light x) infra-red light y) radar z) microwaves

Description : Of the following, the most energetic form of NON-IONIZING radiation is: w) ultra-violet light x) infra-red light y) radar z) microwaves

Last Answer : ANSWER: W -- ULTRA-VIOLET LIGHT

Which one of the following sets of color combinations is added in color vision in TV’? A. Red, green and blue (Answer) B. Orange, back and violet C. White. red and yellow D. Yellow, green and blue

Description : Which one of the following sets of color combinations is added in color vision in TV’? A. Red, green and blue (Answer) B. Orange, back and violet C. White. red and yellow D. Yellow, green and blue

Last Answer : A. Red, green and blue (Answer)

Danger signals are generally red as red light – (1) is least bright (2) undergoes least deviation (3) has lowest velocity (4) gives comfort to eye

Description : Danger signals are generally red as red light – (1) is least bright (2) undergoes least deviation (3) has lowest velocity (4) gives comfort to eye

Last Answer : (2) undergoes least deviation Explanation: The primary reason why the colour red is used for danger signals is that red light is scattered the least by air molecules. The effect of scattering is inversely ... red which has the highest wavelength of all the colours we can see is scattered the least.

Danger signals are generally red as red light (1) is least bright (2) undergoes least deviation (3) has lowest velocity (4) gives comfort to eye

Description : Danger signals are generally red as red light (1) is least bright (2) undergoes least deviation (3) has lowest velocity (4) gives comfort to eye 

Last Answer : undergoes least deviation 

The sun appears red at sunrise and sunset while it appears white at noon because of _____ A. Refraction B. It is cooler at sunrise and at sunset C. Diffraction leading to red end of the spectrum reaching the earth D. Scattering of light due to dust particles and air molecules

Description : The sun appears red at sunrise and sunset while it appears white at noon because of _____ A. Refraction B. It is cooler at sunrise and at sunset C. Diffraction leading to red end of the spectrum reaching the earth D. Scattering of light due to dust particles and air molecules

Last Answer : ANSWER: D

The sun appears red at sunrise and sunset while it appears white at noon, because A. Of refraction B. It is cooler at sunrise and at sunset C. Of diffraction leading to red end of the spectrum reaching the earth. D. Of Scattering of light due to dust particles and air molecules?

Description : The sun appears red at sunrise and sunset while it appears white at noon, because A. Of refraction B. It is cooler at sunrise and at sunset C. Of diffraction leading to red end of the spectrum reaching the earth. D. Of Scattering of light due to dust particles and air molecules?

Last Answer : C. Of diffraction leading to red end of the spectrum reaching the earth.

A capacitor and a coil are connected in series. The capacitor is charged and allowed to discharge through the coil. The current that will then flow through the capacitor-coil combination will do one of the following things. Will it: w) flow in one direction, beginning at a maximum and decreasing rapidly to zero x) oscillate indefinitely y) oscillate but diminish steadily to zero z) oscillate at high frequency at first but then at slower frequency

Description : A capacitor and a coil are connected in series. The capacitor is charged and allowed to discharge through the coil. The current that will then flow through the capacitor-coil combination will do ... but diminish steadily to zero z) oscillate at high frequency at first but then at slower frequency  

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Last Answer : ANSWER: Z -- VIOLET 

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Description : The greatest induced EMF will occur in a straight wire moving at constant speed through a uniform magnetic field when the angle between the direction of the wire's motion and the direction of the magnetic field is w) 0 degrees x) 30 degrees y) 60 degrees z) 90 degrees

Last Answer : ANSWER: Z -- 90 DEGREES

The characteristic that distinguishes a laser beam from an ordinary light beam is: w) the greater frequency of the laser beam x) the coherence of the laser beam y) the color of the laser beam z) the greater polarization of the laser beam

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Last Answer : ANSWER: X -- THE COHERENCE OF THE LASER BEAM

The particle nature of light is demonstrated by which of the following? w) the photoelectric effect x) the various colors of light y) the speed of light z) diffraction.

Description : The particle nature of light is demonstrated by which of the following? w) the photoelectric effect x) the various colors of light y) the speed of light z) diffraction.

Last Answer : ANSWER: W -- THE PHOTOELECTRIC EFFECT

Light bends around sharp corners as a result of w) refraction x) reflection y) diffraction z) dispersion

Description : Light bends around sharp corners as a result of w) refraction x) reflection y) diffraction z) dispersion

Last Answer : ANSWER: Y -- DIFFRACTION

Diffraction and interference demonstrate which of the following? w) particle nature of light x) wave nature of light y) polarization of light z) refraction of light

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Last Answer : ANSWER: X -- WAVE NATURE OF LIGHT

Which of the following phenomena suggest that light may be a transverse wave? w) reflection x) polarization y) photoelectric effect z) diffraction

Description : Which of the following phenomena suggest that light may be a transverse wave? w) reflection x) polarization y) photoelectric effect z) diffraction

Last Answer : ANSWER: X -- POLARIZATION

The deviation caused for red, yellow and violet colours for crown glass prism are `2.84^(@),3.28^(@)` and `3.72^(@)` respectively. The dispersive powe

Description : The deviation caused for red, yellow and violet colours for crown glass prism are `2.84^(@),3.28^(@)` and `3.72^(@)` respectively. The dispersive powe

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The image shows the dispersion of the white light in the prism. What will be the colours of the X, Y and Z? (a) X: red; Y: green; Z: violet (b) X: violet; Y: green; Z: red (c) X: green; Y: violet; Z: red (d) X: red; Y: violet; Z: green

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One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of (a) violet and green light (b) indigo and green light (c) orange and yellow light (d) blue and red light.

Description : One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of (a) violet and green light (b) indigo and green light (c) orange and yellow light (d) blue and red light.

Last Answer : (d) blue and red light.

When white light passes through a red plate of glass and then through a green plate of glass which one of the following things occur? w) the light is totally absorbed x) the light that emerges is a combination of red and green y) the light that emerges lacks only its red and green components z) the light that emerges is green

Description : When white light passes through a red plate of glass and then through a green plate of glass which one of the following things occur? w) the light is totally absorbed x) the light that emerges is ... ) the light that emerges lacks only its red and green components z) the light that emerges is green

Last Answer : ANSWER: W -- THE LIGHT IS TOTALLY ABSORBED

When a solid material is heated, it always: w) emits a discrete radiation spectrum x) glows red y) emits a continuous radiation spectrum z) emits only visible radiation

Description : When a solid material is heated, it always: w) emits a discrete radiation spectrum x) glows red y) emits a continuous radiation spectrum z) emits only visible radiation

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Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants? (a) Blue and green (b) Green and red (c) Red and violet (d) Violet and blue

Description : Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants? (a) Blue and green (b) Green and red (c) Red and violet (d) Violet and blue

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A color with a wavelength longer than that of yellow is: A. Red B. Blue C. Violet D. Green

Description : A color with a wavelength longer than that of yellow is: A. Red B. Blue C. Violet D. Green

Last Answer : A. Red

.The grating used to observe, diffraction of visible light can have approximately __________. A.300 lines per cm B.3000 lines per cm, C. 15000 lines per cm D. 30 lines per cm

Description : .The grating used to observe, diffraction of visible light can have approximately __________. A.300 lines per cm B.3000 lines per cm, C. 15000 lines per cm D. 30 lines per cm

Last Answer : C. 15000 lines per cm

When a person stands on a scale in an elevator at rest, the scale reads 800 newtons. When the elevator is allowed to fall freely with acceleration of gravity, the scale reads one of the following. Does the scale read: w) 1600 newtons x) 800 newtons y) 400 newtons z) 0 newtons

Description : When a person stands on a scale in an elevator at rest, the scale reads 800 newtons. When the elevator is allowed to fall freely with acceleration of gravity, the scale reads one of the following. Does the scale read: w) 1600 newtons x) 800 newtons y) 400 newtons z) 0 newtons

Last Answer : ANSWER: Z -- 0 NEWTONS

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Description : Refracting telescopes, if uncorrected, suffer from chromatic aberration. Chromatic aberration occurs because: w) red light is focused more strongly than blue light x) blue light is focused more strongly than ... central rays, z) the central light rays are focused more strongly than the outer rays.

Last Answer : ANSWER: X -- BLUE LIGHT IS FOCUSED MORE STRONGLY THAN RED LIGHT 

The photoelectric effect is a demonstration of: w) the wave nature of light x) the particle nature of light y) Compton scattering z) the continuous spectrum of radiation

Description : The photoelectric effect is a demonstration of: w) the wave nature of light x) the particle nature of light y) Compton scattering z) the continuous spectrum of radiation

Last Answer : ANSWER: X -- THE PARTICLE NATURE OF LIGHT 

23 Which one of the following sets of colour combinations is added in colour vision in TV? A. Red, green and blue B. Orange, black and violet C. White, red and Yellow D. Green, Yellow and Blue

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Last Answer : ANSWER: A

Which of the following colour of light deviates least through the prism? (1) yellow (2) green (3) violet (4) red

Description : Which of the following colour of light deviates least through the prism? (1) yellow (2) green (3) violet (4) red

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Which of the following colour of light deviates least through the prism? (1) yellow (2) green (3) violet (4) red

Description : Which of the following colour of light deviates least through the prism? (1) yellow (2) green (3) violet (4) red

Last Answer : red

X-ray diffraction can be observed by using __________. A. Diffraction Grating B. Rock salt crystal C. Convex lens D. Michelson’s interferometer

Description : X-ray diffraction can be observed by using __________. A. Diffraction Grating B. Rock salt crystal C. Convex lens D. Michelson’s interferometer

Last Answer : A. Diffraction Grating

In plane transmission grating, the angle of diffraction for second order maxima for wavelength 5 x 10 -5 cm is 30 0. Calculate the number of lines in one centimeter of the grating surface. A. 1000 lines/cm B. 5000 lines/cm C. 500 lines/cm D. 10000 lines/cm

Description : In plane transmission grating, the angle of diffraction for second order maxima for wavelength 5 x 10 -5 cm is 30 0. Calculate the number of lines in one centimeter of the grating surface. A. 1000 lines/cm B. 5000 lines/cm C. 500 lines/cm D. 10000 lines/cm

Last Answer : B. 5000 lines/cm

Maximum photosynthetic activity occurs in - (1) blue and red region of light (2) green and yellow region of light (3) blue and orange region of light (4) violet and orange region of light

Description : Maximum photosynthetic activity occurs in - (1) blue and red region of light (2) green and yellow region of light (3) blue and orange region of light (4) violet and orange region of light

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Which of the following types of light are strongly absorbed by plants? (1) Violet and orange (2) Blue and red (3) Indigo and yellow (4) Yellow and violet

Description : Which of the following types of light are strongly absorbed by plants? (1) Violet and orange (2) Blue and red (3) Indigo and yellow (4) Yellow and violet

Last Answer : (2) Blue and red

Which of the following types of light are strongly absorbed by plants? (1) Violet and orange (2) Blue and red (3) Indigo and yellow (4) Yellow and violet

Description : Which of the following types of light are strongly absorbed by plants? (1) Violet and orange (2) Blue and red (3) Indigo and yellow (4) Yellow and violet

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Description : Which components of light are absorbed by chlorophyll? (1) Violet and red (2) Indigo and orange (3) Blue and red (4) Violet and yellow

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Which of the following colors of light rays has the shortest wavelength? A. Yellow B. Violet C. Red D. Blue

Description : Which of the following colors of light rays has the shortest wavelength? A. Yellow B. Violet C. Red D. Blue

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