Wave Optics-III Physics Test Series NEET 2020

Test Preparation on Wave Optics-III-Physics Test Series For NEET 2020

1.

The observed wavelength of light coming from a distant galaxy is found to be increased by 0.5% as compared with that coming from a terrestrial source. The galaxy is

1Stationary with respect to the earth
2Approaching the earth with velocity of light
3Receding from the earth with the velocity of light
4Receding from the earth with a velocity equal to 5.1 x106 m / s

2.

If the shift of wavelength of light emitted by a star is towards violet, then this shows that star is

1Stationary
2Moving towards earth
3Moving away from earth
4Information is incomplete

3.

How fast a person should drive his car so that the red signal of light appears green (Wavelength for red colour = 6200SA and wavelength for green colour = 5400A)

11.5 x108m/ s
27.107m/ s
39.3 x107m/ s
42x108m / s

4.

If a star is moving towards the earth, then the lines are shifted towards

1Red
2Infrared
3Blue
4Green

5.

An observer is moving with half the speed of light towards stationary microwave source emitting waves at frequency 10 GHz. What is the frequency of the microwave measured by the observer ? (speed of light = 3 x108 ms^-1 )

115.3 GHz
210.1 GHz
312.1 GHz
417.3 GH

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