HARD
JEE Main
IMPORTANT
Earn 100

A small bulb is placed at the bottom of a tank containing water to a depth of . The refractive index of water is . The area of the surface of water through which light from the bulb can emerge out is . The value of is _____ .

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Important Questions on Ray Optics
HARD
JEE Main
IMPORTANT
A light ray is incident, at an incident angle , on the system of two plane mirrors and having an inclination angle between them (as shown in figure). After reflecting from mirror it gets reflected back by the mirror with an angle of reflection . The total deviation of the ray will be _____ degree.

MEDIUM
JEE Main
IMPORTANT
Consider a light ray travelling in air is incident into a medium of refractive index . The incident angle is twice that of refracting angle. Then, the angle of incidence will be

MEDIUM
JEE Main
IMPORTANT
A convex lens has power . It is cut into two halves along its principal axis. Further one piece (out of the two halves) is cut into two halves perpendicular to the principal axis (as shown in figures). Choose the incorrect option for the reported pieces.

MEDIUM
JEE Main
IMPORTANT
The refracting angle of a prism is and refractive index of the material of the prism is . Then the angle of minimum deviation will be

MEDIUM
JEE Main
IMPORTANT
A parallel beam of light is allowed to fall on a transparent spherical globe of diameter and refractive index . The distance from the centre of the globe at which beam of light can converge is _____ .

MEDIUM
JEE Main
IMPORTANT
The speed of light in media and are and respectively. A ray of light enters from the medium to at an incident angle . If the ray suffers total internal reflection, then

EASY
JEE Main
IMPORTANT
Which of the following statement is correct?

MEDIUM
JEE Main
IMPORTANT
Time taken by light to travel in two different materials and of refractive indices and of same thickness is and respectively. If and the ratio of to is . Then the thickness of material, in meter is: (Given and are velocities of light in and materials respectively).
