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PHYSICS

Physics
What type of lens is used in a magnifying glass

Concave
Convex
None of these
Plano-concave

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Physics
Time of exposure required for taking photograph of an object depends upon the

Brightness of the object
Skill of photographer
Size of the object
Proximity of object

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Physics
A concave lens always forms

An image type which depends on object characteristics
An image type which depends on lens curvature
A real image
A virtual image

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Physics
A concave lens always forms an image which is

Virtual and inverted
Real and inverted
Real and erect
Virtual and erect

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Physics
Which one of the following determines the sharpness of image in a camera ?

The exposure time
Size of the camera
The aperture
The focal length of the lens

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