Question # 1

What does the term e-mail stand for:

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Emergency mail

Electronic mail

Extra mail

External mail

The principal focus of a concave mirror is:

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Virtual

Real

Imaginary

Dual aspect

The point through which rays of light pass after reflection from concave mirror is called principal:

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Focus

Circle

Axis

Radius

Magnification of mirror is given by:

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m=p/q

m=q/p

m=pxq

m=1/p+q

Optical fibre are:

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Cheap

Flexible

Lighter

All of these

To see stomach problems we use:

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Gastroscope

Bronchoscope

Cystoscope

All of these

If focal length of a lens is 1m, then its power will be:

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1 D

0.5 D

1.5 D

1 D

When a ray of light enters from denser medium to rare medium, the angle of incidence for which angle of refraction is 90^o is called:

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angle of incidence

critical angle

angle of refrection

None of these

The ray of the light after reflection from concave mirror passes through:

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Centre

Principal focus

Pole

None of these

The ratio of image height to object height is called:

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Linear magnification

Power

Refraction

Radius of curative

____________ is always virtual in case of convex mirror.

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p

image

object

all of these

Spherical mirrors are used in:

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Medical

Search light

Microscope

All of these

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

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