Question

7. A ray of light is travelling in a direction perpendicular to the

boundary of a parallel glass slab. The ray of light:

a) Is refracted towards the normal

b) Is refracted away from the normal

c) Is reflected along the same path

d) Does not get deviated

8. A ray of light passes from a medium X to another medium Y. No

refraction of light occurs if the ray of light hits the boundary of

medium Y at an angle of:

a) 120o

b) 90o

c) 45o

d) 0

o

9. A lens of focal length 12 cm forms an erect image, three times the

size of the object. The distance between the object and image is:

a) 8 cm

b) 16 cm

c) 24 cm

d) 36 cm

10.If an object is placed 21 cm from a converging lens, the image formed is

slightly smaller than the object. If the object is placed at a distance of 19

cm from the lens, the image formed is slightly larger than the object. The

approximate focal length of the lens is:

a) 20 cm

b) 18 cm

c) 10 cm

d) 5 cm​

Answer 1

Answer:

ay of light is travelling in a direction perpendicular to the boundary of a parallel glass slab

Explanation: