Question

1). X: When a light ray travels from one medium to another medium, it bends and travels


Y: When a light ray travels from one medium to another medium, its velocity changes.


a) Both X and Y are correct

b) Both X and Y are incorrect


c) Both X and Y are correct; Y is correct explanation of X


d) Both X and Y are correct; Y is not correct explanations of X



2. __________ gives an idea about how fast or how slow a light ray travels in a medium.


3. The relation between object distance, image distance and focal length will be given by _______


4. What is meant by divergent beam?​

Answer 1

Answer:

1. C

2. refractive index

3. 1/f = 1/u + 1/v

Answer 2

Answer:

1.d

2.refractive index

3.object distance=u

image distance=v

focal length=f

-if it is mirror 1/u+1/v=1/f

-if it is lens 1/v-1/u=1/f