Physics GK · all questions

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Q141

Colour in a colour television is produced by a combination of three basic colours, they are

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Q142

Spherical mirror with reflective surface curved outwards. It is called:

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Q143

If the angle of incidence of a concave mirror is 30°, what will be the value of the angle of reflection?

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Q144

In a magnifying glass . . . . . . . . lens is used.

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Q145

The lens of the eye is behind the

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Q146

Which one of the following combinations of aperture and shutter speed of a camera will allow the maximum exposure?

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Q147

Astronauts see the sky . . . . . . . . from spacecraft.

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Q148

When a CD (Compact disc used in audio and video systems) is seen in Sunlight, rainbow-like colours is seen. This can be explained on the basis of the phenomenon of

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Q149

A star appears twinkling in the sky because of

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Q150

Which can divide the sun's light into its constituent colors?

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Q151

Which one of the following phenomenon is used in optical fibres?

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Q152

The Sun is visible to us a few minutes before the actual sunrise because of

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Q153

The number of colours contained in the Sunlight is

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Q154

If you look into a mirror and find that the image (your reflection) is smaller than you, then the type of mirror is:

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Q155

The change in focal length of an eye lens is caused by the action of the . . . . . . . .

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Q156

The colour of the star is an indication of its

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Q157

. . . . . . . . is also called a diverging mirror-

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Q158

Which of the following radiations has the highest energy per quantum?

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Q159

The relation between focal length and radius of curvature of a mirror is . . . . . . . .

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Q160

The ability of the eye to focus on both, near and distant objects, by adjusting its focal length, is called the . . . . . . . . of the eye.

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