they can detect faint galaxies which no optical telescope can
they can work even in cloudy conditions
they can work during the day and night
All of the above
Radio waves, microwaves, infra-red spectrum, ultraviolet rays, X-rays and gamma rays are classified as _.
Radioactive disintegration of uranium ultimately results in formation of
Radioactive elements can be traced out in living cell through a technique called
Radioactive elements emit:
Railway tracks are banked on curves
Railway tracks are banked on curves so that
Rain drops acquire spherical shape due to
Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from
Rainbow is due to
Rainbow is formed due to