Q181
Open questionWho measured the velocity of light first ?
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Q182
Open questionLight houses are places with powerful lights to :
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Q183
Open questionIt is dangerous to observe Solar eclipse with naked eyes because
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Q184
Open questionFormation of shadows can be explained by
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Q185
Open questionThe locomotion of insects to the source of light is called :
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Q186
Open questionWhich is an example of Phototropism?
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Q187
Open questionLight travels fastest in
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Q188
Open questionLight travels slowest in
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Q189
Open questionLight from the sun reaches us in nearly
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Q190
Open questionAn image formed by a plane mirror, that cannot be obtained on a screen is called ________
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Q191
Open questionLight from Sun reaches Earth in approximately
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Q192
Open questionThrough which light cannot pass?
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Q193
Open questionThe speed of light in air is
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Q194
Open questionEclipses occur due to which optical phenomena?
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Q195
Open questionWhen a bottle of scent is kept open in a corner of a room its odour is felt in all parts of the room. This is due to the phenomenon of :
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Q196
Open questionVegetables are cooked in lesser time by adding a pinch of salt while cooking because
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Q197
Open questionWhich of the following is not an aerosol?
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Q198
Open questionWhat is the process of conversion of solid state directly to gaseous state called?
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Q199
Open questionSolids have definite shapes.This is because
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Q200
Open questionThe amount of matter in a ball of steel is its :
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