91.  A real Gas can act as an ideal gas at -

Answer & Explanation
Low pressure and High temperature

92.  1st Law of thermodynamics is normally related to

Answer & Explanation
Law of conservation of energy

93.  Density of water is 1G/CC. it is strictly valid at -

Answer & Explanation
40C

94.  Why clouds are float in atmosphere?

Answer & Explanation
Low density

95.  Twinkling of stars is due to -

Answer & Explanation
Atmospheric Refraction

96.  Near Point for Long sightedness defected person is-

Answer & Explanation
More than 25cm

97.  Plate of Blue glass appears blue in sunlight because -

Answer & Explanation
transmits the blue colour

98.  For total internal reflection, ray of Light Has to pass through -

Answer & Explanation
Glass to water

99.  Dioptre is the unit of

Answer & Explanation
Power of lens

100.  What is a zoom lens?

Answer & Explanation
Alenswithatransitional focal length

101.  Light beam which is highly directional is called:

Answer & Explanation
Laser

102.  The word 'Insolation' means -

Answer & Explanation
Incoming solar radiation

103.  Ozone in outer atmosphere Helps us-

Answer & Explanation
In absorbing the Ultra violet radiations.

104.  Maximum biological damage occours due to -

Answer & Explanation
Gama Rays

105.  Distant objects are visible as a little out of focus in the condition:

Answer & Explanation
Myopia
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