The intensity of the refracted light is always …………… the intensity of incident light:

1. greater than
2. equal to
3. less than 
4. none of the above

The ray AO is shown in the figure given below. The path of refracted ray and emergent ray will be:

(1) the refracted ray will bend towards normal
(2) the refracted ray will bend away from normal
(3) the emergent ray will bend towards normal
(4) emergent ray will bend away from normal

1. (1) and (3)
2. (1) and (4)
3. (2) and (3)
4. (2) and (4)

If refractive indices of medium 1 and medium 2 are same, the speed of light will:

1. increase
2. decrease
3. remain the same
4. none

When light passes from a denser medium to a rarer medium, its wavelength :

1. decreases
2. increases
3. remains the same
4. none