Given instructions same as in chapter 1.
Assertion:Radio waves can be polarised.
Reason:Sound waves in air are longitudinal in nature.

In these question, a statement of asertion followed by a statement of reason is given .Choose the correct answer out of the following choices: Assertion and reason both are correct statements and reason is correct explanation for assertion. Assertion and reason both are correct statements but reason is not correct explanation for assertion. Assertion is correct statement but reason is wrong statement. Assertion is wrong statement but reason is correct statement. Assertion:Radio waves can be polarised. Reason:Sound waves in air are longitudinal.

Speed of sound wave in air

Can sound waves in air be polarised?

Given instructions same as in chapter 1. Assertion:Ultraviolet radiations are of higher frequency waves are dangerous to human beings. Reason:Ultraviolet radiations are absorbed by the atmosphere.

General instructions same as in chapter 1. Assertion:A convex mirror cannot form real images. Reason:Convex mirror converges the parallel rays that are incident on it.

General instructions same as in chapter 1. Assertion: An atom has equal number of electrons and protons. Reason:In an atom there are equal number of electrons, protons and neutrons.