Electromagnetic...

Directions: In the following question, a statement of Assertion is given, which is followed by a corresponding statement of Reason. Mark the correct answer as: (a) If both Assertion and Reason are true and Reason is correct explanation of Assertion. (b) If both Assertion and Reason are true, but Reason is not correct explanation of Assertion. (c) If Assertion is true, but Reason is false. (d) If both Assertion and Reason are false. Assertion: A tube-light emits white light. Reason: Emission of light in a tube takes place at very high temperature.

Directions: The following question has four choices out of which ONLY ONE is correct. The pressure exerted by an electromagnetic wave of intensity I (W/m2) on a non-reflecting surface is _______ (where c is the velocity of light.)

A changing magnetic field gives rise to

Directions: The following question has four choices out of which ONLY ONE is correct. What is the frequency of emitted radiation when H atom changes from an energy state n = 2 ton = 1?

Directions: The following question has four choices out of which ONLY ONE is correct. Infrared radiation was discovered in 1800 by

Which of the following electro?magnetic radiation has a smaller wavelength?

Directions: The following question has four choices out of which ONLY ONE is correct. An electric line of force in the xy plane is given by equation x2 + y2 = 1. A particle with unit positive charge, initially at rest at the point x = 1, y = 0 in the xy plane

Directions: The following question has four choices out of which ONLY ONE is correct. Visible fraction of light lies in the wavelength of range

Electromagnetic waves are radiated by