Fig. shows a surface XY separating two transparent media, medium 1 and medium 2. Lines ab and cd represent wavefronts of a light wave travelling in medium 1 and incident on XY. Line ef and gh represent wavefront of the light wave in medium 2 after rafraciton.

The phase of the ligth wave at c, d, e, and f are `phi_(c)`, phi_(d), `phi_(e)` and `phi_(f)`, respectively. It is given that `phi_(c ) != phi_(f)`. Then
A. `phi_(c )` cannot be equal to `phi_(d)`
B. `phi_(d )` can be equal to `phi_(d)`
C. `phi_(d ) – phi_(f)` is equal to `phi_(c) – phi_(e)`
D. `phi_(d ) – phi_(c)` is not equal to `phi_(f) – phi_(e)`

Fig. shows a surface XY separating two transparent media, medium 1 and medium 2. Lines ab and cd represent wavefronts of a light wave travelling in medium 1 and incident on XY. Line ef and gh represent wavefront of the light wave in medium 2 after rafraciton.

The phase of the ligth wave at c, d, e, and f are `phi_(c)`, phi_(d), `phi_(e)` and `phi_(f)`, respectively. It is given that `phi_(c ) != phi_(f)`. Then
A. `phi_(c)`cannot be equal to`phi_(d)`
B. `phi_(d)` can be equal to`phi_(c)`
C. `(phi_(d)-phi_(f))` is equal to`(phi_(c)-phi_(e))`
D. `(phi_(d)-phi_(c))` is not equal to`(phi_(f)-phi_(e))`

Fig. shows a surface XY separating two transparent media, medium 1 and medium 2. Lines ab and cd represent wavefronts of a light wave travelling in medium 1 and incident on XY. Line ef and gh represent wavefront of the light wave in medium 2 after rafraciton.
Speed of light is
A. the same in medium 1 and medium 2
B. larger I medium 1 than in medium 2
C. larger in medium 2 than in medium 1
D. different at b and d.

Fig. shows a surface XY separating two transparent media, medium 1 and medium 2. Lines ab and cd represent wavefronts of a light wave travelling in medium 1 and incident on XY. Line ef and gh represent wavefront of the light wave in medium 2 after rafraciton.

Light travel as a
A. parallel beam in each medium
B. convergent beam in each medium
C. divergent beam in each medium
D. divergent beam in one medium and convergent beam in the other medium

Fig. shows a surface XY separating two transparent media, medium 1 and medium 2. Lines ab and cd represent wavefronts of a light wave travelling in medium 1 and incident on XY. Line ef and gh represent wavefront of the light wave in medium 2 after rafraciton.
Speed of light is
A. the same in medium -1 and medium-2
B. the larger in medium -1than the medium-2
C. the larger in medium -2than the medium-1
D. different at`b`and `d`

Fig. shows a surface XY separating two transparent media, medium 1 and medium 2. Lines ab and cd represent wavefronts of a light wave travelling in medium 1 and incident on XY. Line ef and gh represent wavefront of the light wave in medium 2 after rafraciton.
Speed of light is
A. the same in medium-`1` and medium-`2`
B. larger in medium-`1` than in medium-`2`
C. larger in medium-`2` than in medium-`1`
D. different ab `b` and `d`