Question # 1

Half of radius of curvature is called:

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Focal length

Principal focus

Axis

None of these

The ratio of image height to object height is called:

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Linear magnification

Power

Refraction

Radius of curative

From which of the following we can get information almost about everything:

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Book

Teacher

Computer

Internet

Which types of image is formed by a concave lens on a screen?

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Inverted and real

Inverted and virtual

upright and real

Upright and virtual

When the object is placed beyond 2F of a convex lens, the image formed will be:

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Real, inverted and smaller than the object

Real, inverted and of the same size as the object

Real, inverted and larger in size than the object

Virtual, erect and larger in size than the object

To see from submarine the ship at the surface of water , we use:

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Telescope

Microscope

Peri scope

Prism

The principal focus of a concave mirror is:

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Virtual

Real

Imaginary

Dual aspect

Power of convex lens is 10 D. Its focal length is:

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100 m

10 m

1 m

0.1 m

Astronauts in space need to communicate with each other by radio links because:

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Sound waves travel very slowly in space

Sound waves travel very fast in space

Sound waves cannot travel in space

Sound waves have low frequency in space

The distance between principal focus and pole of mirror is called:

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Princpal focus

Focal length

P

Image

____________ is always virtual in case of convex mirror.

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p

image

object

all of these

Angle opposite to the base of triangle of prism is called:

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angle of incidence

angle of refraction

angle of prism

emerging angle

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10th Class Physics Chapter 12 Geometrical Optics English Medium KPK Boards Online Mcqs MCQs With Answers

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