Ans: (c)
110. The diffusion of light in the atmosphere is due to : [IAS (Pre) 2003]
   (a) carbon dioxide
   (b) dust particle
   (c) helium
   (d) water vapour
Ans: (b)
111. A coin in a beaker filled with water appears raised. This phenomenon
   occurs because of the property of [NDA 2010]
   (a) reflection of light
   (b) refraction of light
   (c) total internal reflection light
   (d) interference of light
Ans: (b)
112. A ray of light falls on a transparent glass plate. Apart of it is reflected and
   a part is refracted. The reflected and refracted rays can be perpendicular to
   each other for [NDA 2010]
   (a) angle of incidence equal to 900
   (b) angle of incidence equal to zero
   (c) only one angle of incidence
   (d) more than one angle of incidence
Ans: (a)
113. A man with a dark skin, in comparison with a man with a white skin, will
   experience [NDA 2010]
   (a) less heat and less cold
   (b) less heat and more cold
   (c) more heat and less cold
   (d) more heat and more cold
Ans: (c)
114. Which one among the following denotes the smallest temperature? [NDA
   (a) 1° on the Celsius scale