It absorbs suns rays
It reflects suns rays
It retains the heat inside by the green house effect
It rediates heat better than metals
The critical angle for a transport solid is 30°. Then its refractive index is
The critical angle of a glass slab increases with
The density of a gas is maximum at
The density of the liquid when heated
The density of water is 1 g/cc. This is strictly valid at
The device used for locating submerged objects under sea is.
The device used for measuring the wavelength of X-rays is
The device used to change the speed of an electric fan is
The device used to convert solar energy into electricity is
The device which converts AC to DC is