Physics Past Questions and Answers

A ray undergoes a minimum deviation at 40<sup style='font-size: smaller;'>o</sup> when it is incident on equilateral triangular glass prism. Calculate the refractive index of the prism

A 1.48
B 1.50
C 1.53
D 1.67

Question 3617:

Total internal reflection occurs in an optical prism when light rays

A Travel from the prism into an optically denser medium
B Are incident in the prism at an angle greater than the critical angle
C Are incident normally in the prism
D Travel from the prism to the air

Question 3618:

The speed of light in a certain medium is V while its speed in a vacuum is C. The absolute refractive index of the medium is

A C + V
B \(\frac{C}{V}\)
C \(\frac{V}{C}\)
D C - V

Question 3619:

An object is placed 20.0cm in front of a converging lens of focal length 15.0cm. Calculate its image distance

A 1.3cm
B 8.6cm
C 35.0cm
D 60.0cm

Question 3620:

Presbyopia is a defect of the eye resulting from

A Weak ciliary muscles
B Short eyeball
C Loss of sphericity of the lens
D Long eyeball