Question # 1

An object is placed 6 cm away in front of a concave mirror that has 10 cm focal length. Determine the location of the image:

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-5 cm

-10 cm

-15 cm

-20 cm

Critical angle for diamond is:

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60^o

24^o

26^o

49^o

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

CD which is made of soft material is called:

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Hard disk

Floppy disk

Iron disk

Copper disk

Optical fibre are:

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Cheap

Flexible

Lighter

All of these

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

Half of radius of curvature is called:

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Focal length

Principal focus

Axis

None of these

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

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refraction ray

incident ray

reflected ray

emergent ray

Which of the following is not processing:

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Arranging

Manipulating

Calculating

Gathering

To see stomach problems we use:

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Gastroscope

Bronchoscope

Cystoscope

All of these

Snell' law is:

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n = sin<x/sin <r

n=sin <i/sin<r

n = sin <r/sin<i

<i/<r

The line which passes through pole of the mirror and center of curvature is called principal:

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axis

Focus

Line

None of these

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

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Frequency

Period

Wavelength

Amplitude

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