Question # 1

The angle of which prism deviates the incident ray is called:

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angle of incident

angle of reflection

angle of deviation

angle of minimum deviation

A data storage device is:

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Printer

Hard disk

Monitor

CPU

The totally reflectiing prism one angle is of:

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45^o

90^o

180^o

120^o

The focal length is related to radius of curvature by the formula:

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f = 2R

f = 4R

f = R/2

R = f/2

An example of input device computer is:

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Keyboard

printer

monitor

RAM

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

The data stored in C.D is:

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680 MB

650 MB

700 MB

750 MB

The principal focus of a concave mirror is:

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Virtual

Real

Imaginary

Dual aspect

What does the term e-mail stand for:

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Emergency mail

Electronic mail

Extra mail

External mail

The mirror whose inner surface is reflecting is called:

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Concave mirror

Convex mirror

Miroor

Lens

Focal length for concave mirror is :

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-ve

+ve

same

none of these

Spherical mirrors are used in:

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Medical

Search light

Microscope

All of these

Totally reflecting prism turns the incident ray at an angle of:

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90^o

60^o

75^o

45^o

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

Snell's law is stated as:

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Sin i / sin r = n1/n2

sin i / sin r = n2/n1

sin r / sin i = n2/n1

sin r / sin i = 2n2/n1

For a normal person audible frequency range for sound wave lies between:

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10 Hz and 10kHz

20Hz and 20 kHz

25 Hz and 25 kHz

30Hz and 30 kHz

The refractive index of internal coating of optical fibre is:

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1.56

1.51

1.53

1.58

The distance between two consecutive waves compressions or rarefactions is called:

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Focal length

Wave length

Frequency

Time period

Totally reflecting prism is used in:

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periscope

binoculars

periscope and binocular

telescope

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