MDCAT Physics Chapter 7 Light Online Test With Answers

MDCAT Physics Chapter 7 Light Online Test

Sr. # Questions Answers Choice
1 Fraunhofer's lines commonly visible in the sun's spectrum are examples of Line emission spectrum Line absorption spectrum Band emission spectrum Band absorption spectrum
2 On a rainy day if there is an oil drop on tar road colored rings are seen around this drop This is because of Interference pattern produced due to thin oil film Diffraction pattern Polarization Total internal reflection of light
3 The light produced by a laser is all the following except Incoherent Monochromatic In the form of a narrow beam Electromagnetic
4 A spectrum which contains all wavelengths without any break is called Emission spectrum Line spectrum Continuous emission spectrum All of them
5 In Huygen's wave theory the locus of all points in the same state of vibration is called A half-period zone Vibrator Wave front A ray
6 The velocity of light in vacuum can be changed by changing Frequency Amplitude Wavelength None of these
7 Choose the correct statement Rays are normal to wave front Rays may be normal to wave front Rays are not normal to wave front There is no relationship between rays and wave fronts
8 The splitting of white light into several colors on passing through a glass prism is due to Refraction Reflection Interference Diffraction
9 A polarizer is used to Reduced intensity of light Produce polarized light Increase intensity of light Produce unpolarised light
10 In young's double slit experiment the separation between the slit is halved and distance between the slit and screen is doubled.The fringe width is Unchanged Halved Doubled Quadrupled
11 Plane microwaves are incident on a long slit having a width of 5 cm.The wavelength of the microwaves if the first minima is formed at 30° is 25 cm 5 cm 2.5 cm 5 mm
12 Which of the following properties show light is transverse wave in nature? Interference Reflection Diffraction Polarization
13 To demonstrate the phenomenon of interference we require two sources that emit radiation Of same frequency Different wavelength Of the same frequency and having definite phase relationship Of nearly the same frequency
14 The tip of a needle does not give a sharp image it is due to Polarization Interference Diffraction None of these
15 Which effect provides direct experimental evidence that light is a transverse rather than a longitudinal wave motion? Light can be diffracted Two coherent light waves can be made to interfere. The intensity of light from a point source falls off inversely as the square of the distance from the source Light can be polarized
16 Two monochromatic radiations X and Y are incident normally on a diffraction grating.The second order intensity maximum for X coincides with the third order intensity maximum for Y what is the ratio wavelength of X/wavelength of Y? 1/2 2/3 3/2 2/1
17 Which of the following gives three regions of the electromagnetic spectrum in order of increasing wavelength? Gamma rays,microwaves,visible radiation Ultraviolet infra-red microwaves Radio waves ultraviolet X-rays Visible radiation gamma rays radio waves
18 Which effect provides direct experiment evidence that light is a transverse rather than a longitudinal,wave motion? Light can be diffracted Two coherent light waves can be made to be interfere The intensity of light from a point source falls off inversely as the square of the distance from the source Light can be polarized
19 Ultra-violet rays differ from X-rays in that ultra - violet rays Cannot be diffracted Cannot be polarized Do not affect a photographic plate Have a lower frequency
20 Which of the following frequency ranges includes most of the electromagnetic waves emitted by the ultra - violet tubes used in a sun bed? 5 x 10<sup>5</sup> to 5 x 10<sup>8</sup> Hz 5 x 10<sup>8</sup> to 5 x 10<sup>11</sup> Hz 5 x 10<sup>11</sup> to 5 x 10<sup>14</sup> Hz 5 x 10<sup>14</sup> to 5 x 10<sup>17</sup> Hz
Download This Set

Is this page helpful?