Question # 1

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

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90^o

60^o

75^o

45^o

Magnification of mirror is given by:

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m=p/q

m=q/p

m=pxq

m=1/p+q

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

The loudness of a sound is most closely related to its:

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Frequency

Period

Wavelength

Amplitude

A converging mirror with a radius of 20 cm creates a real image 30 cm from the mirror. What is the object distance?

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5.0 cm

7.5 cm

15 cm

20 cm

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

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Focal length

Wave length

Frequency

Time period

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

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refraction ray

incident ray

reflected ray

emergent ray

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

When light passes through a prism it deviates from its original path due to:

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Reflection

Diffraction

Interference

Refraction

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

A device which has two ways communication is:

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Television

Radio

Hard disk

Mobile phone

The centre of spherical mirror is called:

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Focus

Axis

Centre

Pole

A normal eye can see near objects clearly at a distance of:

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20 cm

25 cm

30 cm

35 cm

The minimum value of angle of deviation is called:

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Minimum angle

incident angle

angle of minimum deviation

None of these

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

Spherical mirrors are used in:

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Medical

Search light

Microscope

All of these

An example of input device computer is:

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Keyboard

printer

monitor

RAM

Which form of energy is sound:

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Electrical

mechanical

Thermal

Chemical

An object of placed at he centre of curvature of a concave mirror. The image produced by the mirror is located:

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out beyond the centre of curvature.

at the centre of curvature

between the centre of curvature and the focal point

at the focal point

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