Use of the minimum deviation formula - 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 1987

A ray of light is incident at an angle of 30^o on one top surface of a parallel-sided glass block of refractive index 1.5. The ray finally emerges from the lower surface. What is the angular deviation of the emergent ray?

A. 60^o
B. 39^o
C. 28^o
D. 0^o

Question 3:

• JAMB 2003

A ray incident on a glass prism undergoes minimum deviation when the

A. Incident angle is equal to the angle of refraction
B. Refraction angle equals 90^o
C. Incident angle equals 90^o
D. Incident angle is equal to the angle of emergence

Question 4:

• JAMB 2005

The figure above shows a plot of angles of deviation through a glass prism when light is incident at θ degrees on the prism. The incident angle that produces the minimum deviation is

A. 20^o
B. 18^o
C. 35^o
D. 25^o

Question 5:

• JAMB 2013

The angle of deviation of light of various colours passing through a triangular prism increases in the order

A. Red → green → blue
B. Green → violet → blue
C. Blue → red → green
D. Blue → green → red