Ray Optics-II Physics Test Series NEET 2020

Test Preparation on Ray Optics-II-Physics Test Series For NEET 2020

1.

A light wave has a frequency of 4x10¹⁴ Hz and a wavelength of 5x10^-7 metres in a medium. The refractive index of the medium is

11.5
21.33
31.0
40.66

2.

1a
2b
3c
4d

3.

Light travels through a glass plate of thickness t and having refractive index n. If c is the velocity of light in vacuum, the time taken by the light to travel this thickness of glass is

11/nc
2tnc
3t/c
4tc /n

4.

A microscope is focussed on a mark on a piece of paper and then a slab of glass of thickness 3 cm and refractive index 1.5 is placed over the mark. How should be microscope moved to get the mark in focus again

11 cm downward
22 cm upward
31 cm upward
44.5 cm downward

5.

In refraction, light waves are bent on passing from one medium to the second medium, because, in the second medium

1The frequency is different
2The coefficient of elasticity is different
3The speed is different
4The amplitude is smaller

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