Question

A plane wavefront travels from air to glass and is obliquely incident on a plane glass surface. Which of the following quantities, for the wavefront, will change?

• A. width of the wavefront
• B. speed of the wavefront
• C. direction of travel, of the wavefront
• D. All of the above

Answer 1

The correct option is D All of the above

As a plane wavefront travels from air to glass, its
(i) speed decreases
(ii) width increases
(iii) the direction of travel changes

Hence, $\left(D\right)$ is the correct answer.