Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 120

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In the figure given below, there are two convex lens $L_{1}$ and $L_{2}$ having a focal length of $f_{1}$ and $f_{2}$ respectively. The distance between $L_{1}$ and $L_{2}$ will be

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Important Questions on Ray Optics

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 121

A virtual erect image by a diverging lens is represented by

(u, v, f

are coordinates

)

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 122

What should be the value of distance $d$ so that the final image is formed on the object itself. (focal lengths of the lenses are written on the lenses).

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 123

A thin linear object of size

1 mm

is kept along the principal axis of a convex lens of focal length

10 cm

. The object is at

15 cm

from the lens. The length of the image is

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 124

A glass lens is placed in a medium in which it is found to behave like a glass plate. The refractive index of the medium will be:

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 125

A divergent lens will produce

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 126

The minimum distance between object and it's real image formed by a convex lens is:

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 127

A biconvex lens forms a real image of an object placed perpendicular to its principal axis. Suppose the radii of curvature of the lens tend to infinity. Then the image would

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 128

The radius of curvature of the convex surface of a thin plano-convex lens is

15 cm

and refractive index is

1.6

. The power of the lens is ?