IR radiation
UV radiation
gamma rays
x-rays
Ozone protects biosphere from
Parabolic mirors are used in
Parallax of one arc secondтАЦ is a unit of which of the following?
Pasteurisation of milk means-
Permissible noise level at Residential area during night time is :
Persistance of vision is the principle behind
Persistence of vision is the Principle behind:
Persons suffering from myopia are advised to use
Photon is the fundamental unit/ quantum of
Pick out the only scalar quantity
