Question

A student traces the path of a ray of white light through a rectangular glass slab and marks the angles of incidence (i), refraction (r) and emergence (Le) as shown. Which angle or angles has he NOT marked correctly?; A. i only; B. i and r; C. i and e; D. r and e(Delhi - 2012)

Answer 1

Answer:

if the figure is given then we can see where the marking is incorrect

Explanation:

Answer 2

The student has not marked C. ∠i and ∠e correctly.

Explanation:

The image given in the question is attached below.

• The ray that falls on the glass slab is called incident ray.
• The ray that is refracted in the glass slab is called refracted ray.
• The ray that is emerged from the glass slab is called emerged ray.
• The line that is draw perpendicular to glass slab is called normal line.
• The angle between normal line and incident ray is called angle of incidence.
• The angle between normal line and refracted ray is called angle of refraction.
• The angle between normal line and emerged ray is called angle of emergence.
• In the given image, the angle is incidence is drawn between glass slab and incident ray and the angle of emergence is drawn between glass slab and emergent ray. Thus, it is wrong.