Magnifying power of a simple microscope can be increased by?
Correct answer B. Decreasing focal length of the lens
Tip: press A, B, C or D to answer, and N for the next question.
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See allTwinkling of stars is caused by?
Correct answer C. refraction of light
In a fission nuclear reaction, a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear reaction is called?
Correct answer D. Fusion nuclear reaction
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The principle used in radar is the same as that of Sonar. In radar we use radio waves ; whereas in sonar we use?
Correct answer C. Ultrasonic
A six feet tall lady wants to see her full image in a plane mirror . The minimum length of the mirror will be?
Correct answer D. 3 feet
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