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

92.  1st Law of thermodynamics is normally related to

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

94.  Why clouds are float in atmosphere?

95.  Twinkling of stars is due to -

96.  Near Point for Long sightedness defected person is-

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

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

99.  Dioptre is the unit of

100.  What is a zoom lens?

101.  Light beam which is highly directional is called:

102.  The word 'Insolation' means -

103.  Ozone in outer atmosphere Helps us-

104.  Maximum biological damage occours due to -

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