Question

1. A scientist tries to direct a ray of light in a glass block so that no light
escapes from the top of the block. However, some light does escape. The
scientist changes angle X and stops the light escaping from the top. Which
row in the table describes the change to angle X and the name of the
effect produced?
light escaping
from top of block
top of block
glass block
X
ray of
light
change to angle X
name of effect produced
A
decrease
total internal reflection
B
decrease
total internal refraction
с
increase
total internal reflection
D
increase
total internal refraction​

Answer 1

Answer:

This is so much difficult i think

Answer 2

Answer:

c and d

Explanation:

As we keep increasing incident angle , refracted ray become parallel to surface of the block.

After a certain angle light stop refracting  and all the light reflect back from surface. This phenomenon is known as total internal reflection.

Hence option C and D are correct.