Description : Which one of the following instruments is used to study dispersion of light? (1) Microscope (2) Telescope (3) Spectrometer (4) Photometer
Last Answer : (3) Spectrometer Explanation: Dispersion occurs when different frequencies of light have different phase velocities, due either to material properties (material dispersion) or to the geometry ... portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials.
Description : Infrared radiations are detected by (1) Pyrometer (2) Nanometer (3) Photometer(4) Spectrometer
Last Answer : Photometer
Description : The resolving power of a spectrometer consisting of collimator, a grating and a telescope can be increased by (A) increasing the angular magnification of the telescope (B) increasing the period of the ... (C) decreasing the period of the grating (D) decreasing the slit-width of the collimator
Last Answer : The resolving power of a spectrometer consisting of collimator, a grating and a telescope can be increased by decreasing the period of the grating
Description : Which of the following scientific instruments has the greatest resolving power? w) electron microscope x) light microscope y) phase-contrast microscope z) centrifuge
Last Answer : ANSWER: W -- ELECTRON MICROSCOPE
Description : How can one can distinguish a telescope from a microscope?
Last Answer : – By observing size of the lens
Description : The instrument used to see the distant objects on the Earth is – (1) Terrestrial telescope (2) Astronomical telescope (3) Compound microscope (4) Simple microscope
Last Answer : (1) Terrestrial telescope Explanation: A telescope assists the eye chiefly in two way by enlarging the visual angle under which a distant object is seen, and thus magnifying that object; ... organ, thus rendering objects distinct and visible which would otherwise be indistinct and or invisible.
Description : One can distinguish a telescope from a microscope by observing – (1) length (2) colour (3) size of the lens (4) length and size of the lens
Last Answer : (4) length and size of the lens Explanation: Telescope and Microscope are two scientific instruments that serve their purposes differently. One of the main differences between a telescope and a ... the distance from the focal point to the lens is different in these two scientific instruments.
Description : What was invented by 'Zacharias Janssen'? (1) Telescope (2) Microscope (3) Stethoscope (4) Periscope
Last Answer : (2) Microscope Explanation: In Boreel's investigation Johannes also claimed his father, Zacharias Jansen, invented the compound microscope in 1590.
Description : One can distinguish a telescope from a microscope by observing (1) length (2) colour (3) size of the lens (4) length and size of the lens
Last Answer : length and size of the lens
Description : The instrument used to see the distant objects on the Earth is (1) Terrestrial telescope (2) Astronomical telescope (3) Compound microscope (4) Simple microscope
Last Answer : Terrestrial telescope
Description : What are the differences between a microscope and a telescope?
Last Answer : They are both similar in that it’s all about a game of bending light to meet your need using lenses in various configurations. Hope this helps.
Description : How can one can distinguish a telescope from a microscope? -Do You Know?
Last Answer : answer:
Last Answer : By observing size of the lens
Last Answer : A spectrometer is a device that can be used to create and read the spectrum of different sources .
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.
Description : The waveform of a certain signal can be studied by – (1) Spectrometer (2) Cathode ray oscilloscope (3) p - n junction diode (4) Sonometer
Last Answer : (4) Sonometer Explanation: A spectrometer is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum. Cathode ray oscilloscope is an electronic display ... electron beam that is used to produce visible patterns or graphs on a phosphorescent screen.
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 : Bragg Spectrometer
Description : The waveform of a certain signal can be studied by (1) Spectrometer (2) Cathode ray oscilloscope (3) p – n junction diode (4) Sonometer
Last Answer : Sonometer
Description : Two light sources of intensities 8 cd and 12 cd are placed on the same side of a photometer screen at a distance of 40 cm from it. Where should a 80 c
Last Answer : Two light sources of intensities 8 cd and 12 cd are placed on the same side of a photometer ... 80 cd source be placed to balance the illuminance ?
Description : In optical reading instruments (A) The vertical circle is usually continuous from 0° to 359° (B) The readings increase when the telescope is elevated in the face left position (C) The readings decrease when the telescope is elevated in the face right position (D) All the above
Last Answer : (D) All the above
Description : A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution? (a) Blue (b) Green (c) Yellow (d) Red
Last Answer : (a) Blue
Description : If you wanted to study the surface of a bacterial cell, you would use a. A transmission electron microscope. b. A light microscope with phase-contrast optics. c. A scanning electron microscope. d. A light microscope with dark-field optics.
Last Answer : c. A scanning electron microscope.
Description : If you wanted to study bacterial motility you would most likely use a. A transmission electron microscope. b. A tight microscope with dark-field optics. c. A scanning electron microscope. d. A light microscope with phase-contrast optics.
Last Answer : a. A transmission electron microscope.
Description : Two lamps of illuminating powers 25 cd and 100 cd are placed at the end of a photometer bench 2.0 m long. At what point on the bench will the screen o
Last Answer : Two lamps of illuminating powers 25 cd and 100 cd are placed at the end of a photometer ... of the photometer be equally illuminated on both sides.
Description : Select the correct statement: (1) Lenticel is the exit route for transpiration (2) The action spectra of transpiration is blue and red (3) Transpiration helps the plant to remain cool (4) Transpiration can be measured by photometer
Last Answer : Ans. ((c))
Description : Direct solar radiation is measured with — instrument.(Agriculture MCQ) a. Pyranometer b. Pyrheliometer c. Photometer d. Altimeter
Last Answer : b. Pyrheliometer
Description : A type of photometer used to measure reflection.
Last Answer : reflectometer
Description : Robert Brown is well known for his discovery of (A) Chloroplast (B) Photometer (C) Nucleus (D) Nucleolus
Last Answer : (C) Nucleus
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.
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.
Description : Why would it be advantages to use blue light with compound microscope?
Last Answer : Ans. The limit, to which a microscope can be used to resolve details, depends upon the width of the objective. A wider objective and use of blue light (short wavelength) produces less diffraction and allows more details to be viewed.
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 : 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 light (3) ... particles (4) the wavelength of electrons is smaller as compared to the wavelength of visible light
Last Answer : the wavelength of electrons is smaller as compared to the wavelength of visible light
Description : ‘Mirage' is an example of - (1) Refraction of light only (2) Total internal reflection of light only (3) Refraction and total internal reflection of light (4) Dispersion of light only
Last Answer : (3) refraction and total internal reflection of light
Description : 'Mirage' is an example of – (1) refraction of light only (2) total internal, reflection of light only (3) refraction and total internal reflection of light (4) dispersion of light only
Last Answer : (3) refraction and total internal reflection of light Explanation: A mirage is a naturally occurring optical phenomenon in which light rays are bent to produce a displaced image of distant objects ... significantly warmer air, the light rays bend away from the direction of the temperature gradient.
Description : The redness in atmosphere at Sunrise and Sunset is due to – (1) Refraction of light (2) Reflection of light (3) Dispersion of light (4) Scattering of light
Last Answer : (4) Scattering of light Explanation: The red colour in the sky at sunset (and sunrise) is due to an effect called Rayleigh scattering. At sunrise or sunset, since the Sun is low on the horizon, ... through more of the atmosphere - and therefore bounce off more molecules -than at other times of day.
Description : The splitting of white light into its components is due to: (1) Reflection (2) Refraction (3) Transmission (4) Dispersion
Last Answer : (4) Dispersion Explanation: Dispersion is used to separate a beam of white light into its constituent spectrum of colours. This phenomenon leads to rainbow.
Description : The phenomenon of change in direction of light when it passes from one medium to another is called - (1) Propagation (2) Reflection (3) Refraction (4) Dispersion
Last Answer : (3) Refraction Explanation: Refraction is the change in direction of wave propagation due to a change in its transmission medium. Due to the change of medium, the phase velocity of the wave is changed but its frequency remains constant.
Description : What is the reason for twinkling of stars? (1) Dispersion of light (2) Total internal reflection (3) Atmospheric reflection (4) Atmospheric refraction
Last Answer : (4) Atmospheric refraction Explanation: Seismometers are instrument that measures motion of the ground, including those of seismic waves generated by earthquakes, volcanic eruptions and other seismic ... of these different sources. Seismograph is another Greek term meaning to draw siesmo waves.
Description : "Tice splitting of different colours of light in a prism is : (1) Reflection of light (2) Dispersion light (3) Diffraction light (4) Refraction of light
Last Answer : (2) Dispersion light Explanation: The refractive index of many materials (such as glass) varies with the wavelength or colour of the light used, a phenomenon known as dispersion. This causes ... a wave depends on its frequency, or alternatively when the group velocity depends on the frequency.
Description : Light bends around sharp corners as a result of w) refraction x) reflection y) diffraction z) dispersion
Last Answer : ANSWER: Y -- DIFFRACTION
Description : The phenomenon of change in direction of light when it passes from one medium to another is called (1) Propagation (2) Reflection (3) Refraction (4) Dispersion
Last Answer : Refraction
Description : The redness in atmosphere at Sunrise and Sunset is due to : (1) Refraction of light (2) Reflection of light (3) Dispersion of light (4) Scattering of light
Last Answer : Scattering of light
Description : The splitting of white light into its components is due to: (1) reflection (2) refraction (3) transmission (4) dispersion
Last Answer : dispersion
Description : ‘Mirage’ is an example of (1) refraction of light only (2) total internal, reflection of light only (3) refraction and total internal reflection of light (4) dispersion of light only
Last Answer : refraction and total internal reflection of light
Description : What is the reason for twinkling of stars ? (1) Dispersion of light (2) Total internal reflection (3) Atmospheric reflection (4) Atmospheric refraction
Last Answer : Atmospheric refraction
Description : What was The Italian who first used a telescope to study astronomy born in the same year as Shakespeare?
Last Answer : Feel Free to Answer
Description : Where is the worlds largest single dish telescope located that is used to study astronomy and ionosphere?
Last Answer : Arecibo
Description : Which type of microscope is used to study extremely small things, such as cell structures by passing a beam of electrons through an object?
Last Answer : optical microscope