Question # 1

Concave mirror formula is given by:

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R = 2r

sin<i/sin<r

1/f=1/p+1/q

1/f=1/p-1/q

Bouncing back of light after striking the surface is called:

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Refraction

Reflection

Diffraction

Interference

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

Spherical mirrors are used in:

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Medical

Search light

Microscope

All of these

The mirror whose inner surface is reflecting is called:

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Concave mirror

Convex mirror

Miroor

Lens

The critical angle for glass to:

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24^o

48^o

42^o

50^o

CD which is made of soft material is called:

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Hard disk

Floppy disk

Iron disk

Copper disk

Hard disk is made of:

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Aluminium

Copper

Iron

Plastic

To see stomach problems we use:

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Gastroscope

Bronchoscope

Cystoscope

All of these

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

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Focus

Circle

Axis

Radius

Power of lens is:

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q/p

1/q

1/p

1/f

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

The refractive index of air is:

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6

7

2

1,0003

The distance of the object from the mirror is represented by :

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q

p

m

F

The refractive index of internal coating of optical fibre is:

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1.56

1.51

1.53

1.58

The principal focus of a concave mirror is:

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Virtual

Real

Imaginary

Dual aspect

How does sound travel from its source to your ear:

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By changes in air pressure

By vibration in wires or strings

By electromagnetic waves

By infrared waves

The S.I unit of power of a lens is:

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Dioptre

Volt

Ampere

Watt

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