Radio telescopes are better than optical telescopes because
Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
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Out of the following pairs, which one does not have identical dimension?
Mercury is commonly used as a thermometric fluid rather than water because
Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
Mach number is used in connection with the speed of
On a stationary sail boat, air is blown from a fan attached to the boat. The boat
Stars which appear single to the naked eye but are double when seen through a telescope are
Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
In which of the following industries is mica as a raw material?
Radiocarbon dating technique is used to estimate the age of
Identify the vector quantity from the following
Large astronomical telescopes always use as objective
One should not connect a number of electrical appliances to the same power socket because
Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?