Name the radiations which are absorbed by the green house gases in the earth's atmosphere.
The greenhouse effect is the phenomenon in which _______ radiations of long wavelength is given out from the surface of the earth are absorbed by its atmosphere gases to keep the environment at the earth’s surface and its lower atmosphere, warm.
What would have been the temperature of earth atmosphere in absence of green house gases in it ?
Name two sources, each of infrared radiations and ultraviolet radiations.
What are ultraviolet radiations ? How are they detected ? State one use of these radiations.
(a) Name the high energetic invisible electromagnetic wave which helps in the study of structure of crystals.
(b) State one more use of the wave named in part (a).
Give two properties of ultraviolet radiations which differ from the visible light.
State one harmful effect each of the (a) ultraviolet and (b) infrared radiations.
Name three radiations and their wavelength range which are invisible and beyond the violet end of the visible spectrum.