HARD
JEE Main
IMPORTANT
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A hemispherical glass body of radius 10 cm and refractive index 1.5 is silvered on its curved surface. A small air bubble is 6 cm below the flat surface inside it along the axis. The position of the image of the air bubble made by the mirror is seen :
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Important Questions on Ray Optics
MEDIUM
JEE Main
IMPORTANT
A telescope has an objective lens of focal length and an eyepiece of focal length . If a tall tower at a distance of is observed through this telescope in a normal setting, the angle formed by the image of the tower is , then is close to
MEDIUM
JEE Main
IMPORTANT
You are asked to design a shaving mirror assuming that a person keeps it at from his face and views the magnified image of the face at the closest comfortable distance of . The radius of curvature of the mirror would then be:
HARD
JEE Main
IMPORTANT
Monochromatic light is incident on a glass prism of angle A. If the refractive index of the material of the prism is , a ray, incident at an angle , on the face AB would get transmitted through the face AC of the prism provided:
HARD
JEE Main
IMPORTANT
A thin convex lens of focal length is put on a plane mirror as shown in the figure. When an object is kept at a distance from the lens-mirror combination, its image is formed at a distance in front of the combination. The value of is:
MEDIUM
JEE Main
IMPORTANT
A ray of light is incident from a denser to a rarer medium. The critical angle for total internal reflection is and Brewster's angle of incidence is , such that . The relative refractive index of the two media is
MEDIUM
JEE Main
IMPORTANT
A diver looking up through the water sees the outside world contained in a circular horizon. The refractive index of water is , and the diver's eyes are below the surface of the water. Then the radius of the circle is :
MEDIUM
JEE Main
IMPORTANT
The focal lengths of objective lens and eye lens of a Galilean Telescope are respectively 30 cm and 3.0 cm. Telescope produces virtual, erect image of an object situated far away from it at least distance of distinct vision from the eye lens. In this condition the Magnifying Power of the Galilean Telescope should be :
EASY
JEE Main
IMPORTANT
A thin convex lens made from crown glass has focal length . When it is measured in two different liquids having refractive indices and , it has the focal lengths and respectively. The correct relation between the focal lengths is :
