Critical angle and total internal reflection - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• JAMB 2013

Total internal reflection will not occur when light travels from

A. Water to air
B. Water into glass
C. Glass to air
D. Glass into water

Question 3:

• JAMB 2020

Which of the following conditions are necessary and sufficient for total internal reflection to take place at the boundary between two optical media?
I. Light is passing from optical denser medium to optically less dense medium
II. Light is passing from optically less dense medium to optically denser medium
III. Angle of incidence is greater than a certain critical value
IV. Angle of incidence is lesser than a certain critical value

A. I and II only
B. II only III only
C. III and IV only
D. I and III only