Question # 1

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

From which of the following we can get information almost about everything:

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Book

Teacher

Computer

Internet

The distance of image from mirror is represented by:

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q

p

F

m

Which types of image is produced by the converging lens of human eye if it view a distant object?

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Real , erect, same size

Real, inverted, diminshed

Virtual, erect,diminshed

Virtual, inverted, magnified

The distance between principal focus and pole of mirror is called:

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Princpal focus

Focal length

P

Image

Which of the following quantities is not change during refraction of light?

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Its direction

Its speed

its frequency

Its wavelength

The totally reflectiing prism one angle is of:

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45^o

90^o

180^o

120^o

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 critical angle for glass to:

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24^o

48^o

42^o

50^o

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

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Focal length

Wave length

Frequency

Time period

Mathematical relationship between critical angle "C" and refractive index "n" is:

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N = C

N = 1 / sin c

N = 1 / cos c

N = 1 / sin2 c

Image formed on a camera is:

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real,invertred, and diminished

virtual, upright and diminshed

virtual, upright and magnified

real, inverted and magnified

Sun light consist of ____________ colour

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6

7

5

2

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