General Physica...

Nearly 30% of the solar radiations return back to the space without contributing anything to the Earth's surface temperature. This amount of radiation is known as ________.

The 'Blue Moon' phenomenon occurs ___________.

We always see the same face of the Moon, because _______.  

A person stood alone in a desert on a dark night and wanted to reach his village, which was situated 5 km East of the point where he was standing. He had no instruments to find the direction, but he located the pole-star. The most convenient way now to reach his village is to walk in the _______.

Satellites used for telecommunication relay are kept in  geostationary orbit. A satellite is said to be in such an orbit when ___________.
(1) the orbit is geosynchronous
(2) the orbit is circular
(3) the orbit lies in the plane of the Earth's equator
(4) the orbit is at an altitude of 22236 km
Select the correct answer using the codes given below.

Which one of the following combinations of stalactites and stalagmites occurrences is correct?

The greatest seasonal contrast of insolation on the Earth is in which of the following latitudinal zones?

Chilika Lake is situated in:

The inexhaustible source of energy of the stars is due to  ____________. 

Consider the following statements:
(1) The Earth receives the Sun's energy at the infrared end of the Spectrum.
(2) The Earth re-radiates the Sun's heat as ultraviolet energy.
Which of the statements given above is/are correct?