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Physical Science |
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| 176)Which part of the camera is analogous to the retina in the human eye | |||
| aperture | shutter | ||
| film | lense | ||
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| 177)When a person enters a dark room from bright light, he is not able to see clearly for a while because- | |||
| iris is unable to dilate the pupil immediately | eye is unable to adjust itself immediately | ||
| retina becomes insensitive momentarily | distance between the lens and retina takes time to adjust | ||
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| 178)The accomodation of the eye is produced by | |||
| change the size of the pupil | the ciliary muscles | ||
| the forward movement of the retina | contraction of iris | ||
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| 179)The sky appears blue because | |||
| it is actually blue | all colours interfere to produce blue | ||
| in the white light in the space blue colour dominates | the atmosphere scatters blue colours more than the others | ||
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| 180)To an astronaut, the outer space appears | |||
| white | black | ||
| blue | crimson | ||
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| 181)In the upper space astronaut | |||
| can not see stars during day | can see stars during day all the direction | ||
| can see stars during the day opposite the sun | can not see stars at all | ||
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| 182)Why the sun appears deep orange - red before it sets? | |||
| because it is hotter at the end of the day | because it contains more helium in the evening | ||
| because its light has to travell a thicker atmosphere so other colours get scattered and do not reach us | because it emits anoy orange-red light | ||
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| 183)Soap bubbles show multiple colours when viewed in white light because of | |||
| the interference of the reflected light | the scattering of light by the film | ||
| the characteristics colours of the soap solution | the disperson of light | ||
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| 184)The technique of recording and reproducing three-dimensional images of objects is known as | |||
| audiography | lexicography | ||
| photography | holography | ||
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| 184)When a wave goes from one place to another, it transports | |||
| matter | mass | ||
| energy | nothing | ||
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| 186)The pitch (or shrillness) of sound is determined by its | |||
| speed | frequency | ||
| amplitude | loudness | ||
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| 187)The loudnes of a sound wave is determined by its | |||
| amplitude | frequency | ||
| speed | wavelength | ||
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| 188)A woman's voice is shrillers than a man's due to | |||
| higher amplitude | lower frequency | ||
| higher frequency | higher speed | ||
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| 189)Sound travells at maximum speed in | |||
| vacuum | air | ||
| water | steel | ||
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| 190)Echoes are produced due to | |||
| refraction of sound | reflection of sound | ||
| diffraction of sound | polarization of sound | ||
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