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A planoconvex lens has a focal length of 30 cm and an index of refraction 1.5. Find the radius of the convex surface.

Important Questions on Ray Optics

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Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 6>Q 3
A biconvex lens (μ = 1.5) of focal length 0.2 m acts as a divergent lens of power 1 D when immersed in a liquid. Find the refractive index of the liquid.
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Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 6>Q 4
Two thin converging lenses of focal lengths 20 cm and 40 cm are placed in contact. Find the effective power of the combination.
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Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 6>Q 5
An object placed 20 cm in front of a convex lens has its image 40 cm behind the lens. Find the power of the lens.
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Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 6>Q 6

A lens shown in figure is made of two different materials. A point object is placed on its axis. How many images will be formed.

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Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 6>Q 7
A convex lens of focal length f produces a real image of size is 1n times the size of the object. Find the position of the object.
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Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 6>Q 8
A ray of light strikes a glass plate at an angle of 60°. If the reflected and the refracted rays are perpendicular to each other, find the index of refraction of glass.
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Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 7>Q 1
In the displacement method, the distance between the object and the screen is 70 cm and the focal length of the lens is 16 cm, find the separation between the magnified and diminished image position of the lens.
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Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 7>Q 2
An achromatic doublet of focal length 90 cm si to be made of two lens. The material of one of the lenses has 1.5 times the dispersive power of the other. The doublet is converting type. Find the focal length of each lens.