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IMPORTANT
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A convex lens, of focal length 30 cm, a concave lens of focal length 120 cm, and a plane mirror are arranged as shown. For an object kept at a distance of 60 cm from the convex lens, the final image, formed by the combination, is a real image, at a distance of:
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Important Questions on Ray Optics
EASY
JEE Main
IMPORTANT
An observer looks at a distant tree of height with a telescope of magnifying power of . To the observer, the tree appears as
HARD
JEE Main
IMPORTANT
In an experiment for determination of refractive index of glass of a prism by v/s plot, it was found that a ray incident at angle , suffers a deviation of and that it emerges at angle . In that case which of the following is closest to the maximum possible value of the refractive index?
EASY
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To determine refractive index of glass slab using a travelling microscope, minimum number of readings required are :
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JEE Main
IMPORTANT
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 :
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
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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:
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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:
