Question

The figure shows a surface $XY$ separating two transparent media, medium - $1$ and medium - $2$. The lines $ab$ and $cd$ represent wavefronts of a light wave travelling in medium - $1$ and incident on $XY$. The lines $ef$ and $gh$ represents wavefronts of the light wave in medium - $2$ after refraction.
Light travels as a:

• A. Parallel beam in each medium
• B. Convergent beam in each medium
• C. Divergent beam in each mediu,
• D. Divergent beam in one medium and convergent beam in the other medium

Answer 1

The correct option is A Parallel beam in each medium

Light travels in a parallel beam in each medium because the path difference between two waveform is equal in both the cases.