NAT I Medical Physics With Answers

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NAT I Medical Physics

Sr. # Questions Answers Choice
1 The contrast in the fringes in any interference pattern depends on Fringe width Intensity ratio of the sources Distance between the slits Wavelength
2 If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by monochromatic blue light of the same intensity Fringe width will decrease Fringe width will increase The fringe width will remain unchanged Fringes will become less intense
3 Which one of the following phenomena is not explained by Huygen's construction of wavefront? Refraction Reflection Diffraction Origin of spectra
4 Light appears to travel in straight lines since It is not absorbed by the atmosphere It is reflected by the atmosphere Its wavelength is very small Its velocity is very large
5 The twinkling of stars is due to The fact that stars do not emit light continuously The refractive index of the earth's atmosphere fluctuate Intermittent absorption of star light by its own atmosphere None of them
6 A prism splits a beam of white light into its seven constituent colors this is so because Phase of different colors is different Amplitude of different colors is different Energy of different colors is different Velocity of different colors is different
7 A sun rise or sun set, the sun looks reddish because. The sun is coldest at these times Of the effects of reflection and refraction The sun is hottest at these times Of the scattering of light
8 One cannot see through fog because Fog absorbs light The refractive index of fog is infinity Light suffers total reflection at the droplet in a fog Light is scattered by the droplets in fog
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