Show wet blue and red litmus papers over the watch glass one by one. Which litmus paper shows a color change ?
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The refractive index of glass for light going from aif’to glass is 3/2. The refractive index of air for light going from glass to air ………………….
Correct option is C) 4/6
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Ramu placed a rectangular glass slab over printed letters. The letters appears while ………………. viewing through a glass slab.
B) nearer as its original position
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The watch repairer uses a ……………….. lens to see tiny parts of watch.
A) convex lens
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The sky appears blue because some of the blue component of sunlight is scattered by
A) gas molecules present in air
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Why is blue applied to white clothes? Present four steps of applying blue to the clothes.
Blue is applied to white clothes because- It acts as a fabric whitener/brightener Four steps of applying blue to the clothes- 1.Add blue to water and dissolve well 2.Wet the article to be blued...
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There are 5 balls in a vessel. Out of which 2 are red, 2 are blue and ‘1’ is green.
Correct option is (C) 3/5 Red balls = n(R) = 2, Blue balls = n(B) = 2 and Green balls = n(G) = 1 N(S) = n(R) + n(B) + n(G) = 2+2+1 = 5 Number...
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The force acts between a charged balloon and piece of papers
D) electrostatic
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The force acts between a charged balloon and piece of papers
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If blue litmus is turned into red in water, water is
If blue litmus is turned into red in water, water is Acidic
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If you keep oiled papers in various corners of your house, you find that
(C) dust accumulates on oil paper
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