Rewrite the following statements by selecting the correct options:
i. The speed of light in a medium of refractive index n is………., where c is the speed of light in vacuum.
(a) \(\frac{c}{n}\)
(b) nc
(c) \(\frac{n}{c}\)
(d) \(\sqrt{\frac{c}{n}}\)
ii. The speed of light in a transparent medium having absolute refractive index 1.25 is……….[Speed of light in vacuum ≈ 3 × 108 m/s]
(a) 1.25 × 108 m/s
(b) 2.4 × 108 m/s
(c) 3.0 × 108 m/s
(d) 1.5 × 108 m/s
iii. …………light is deviated the maximum in the spectrpm of white light obtained with a glass prism.
(a) Red
(b) Yellow
(c) Violet
(d) Blue
iv. ………..light is deviated the least in the spectrum of white light obtained with a glass prism.
(a) Red
(b) Yellow
(c) Violet
(d) Blue
v. A ray of light makes an angle of 50° with the surface S1 of the glass slab. Its angle of incidence will be………….
(a) 50°
(b) 40°
(c) 140°
(d) 0°
vi. A glass slab is placed in the path of convergent light. The point of convergence of light:
(a) moves away from the slab
(b) moves towards the slab
(c) remains at the same point
(d) undergoes a lateral shift
vii. In refraction of light through a glass slab, the directions of the incident ray and the refracted ray are…………
(a) perpendicular to each other
(b) non-parallel to each other
(c) parallel to each other
(d) intersecting each other
viii. If we gradually increase the angle of incidence of a ray of light passing through a prism, then…………..
(a) the angle of deviation goes on decreasing
(b) the angle of deviation decreases but after certain value of incident angle, deviation angle increases
(c) the angle of deviation goes on increasing
(d) the angle of deviation increases but after certain value of incident angle, deviation angle decreases
