Question # 1

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

In totally reflecting prism one angle is of 90^o, and other two angles are of:

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30^o,30^o

45^o,90^o

45^o,45^o

40^o,40^o

Magnification of mirror is given by:

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m=p/q

m=q/p

m=pxq

m=1/p+q

The data stored in C.D is:

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680 MB

650 MB

700 MB

750 MB

The critical angle for a beam of light passing from water into air is 48.8 degrees. This mean that all light rays with an angle of incidence greater than this angle will be:

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Absorbed

Totallly reflected

Partially reflected and partially transmitted

Totally transmitted

The ray of light striking to the side of prism is called:

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refraction ray

incident ray

reflected ray

emergent ray

An object is 14 cm is front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?

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4.1 cm

8.2 cm

9.9 cm

20 cm

Bouncing back of light after striking the surface is called:

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Refraction

Reflection

Diffraction

Interference

In a convex mirror the size of the image:

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Is smaller than the size of the object

Is greater than the size of the object

Depends upon the position of the object

Is equal to the size of the object

If a ray of light is glass is incident on an air surface at an angle greater than the critical angle, the ray will.

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refract only

reflect only

partially refract and partially reflect

Diffract only

The minimum value of angle of deviation is called:

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Minimum angle

incident angle

angle of minimum deviation

None of these

A data storage device is:

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Printer

Hard disk

Monitor

CPU

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

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Centre

Principal focus

Pole

None of these

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