Question

Given below are two statements: Assertion (A): Electromagnetic waves can travel through vacuum. Reason (R): Electromagnetic waves consist of oscillating electric and magnetic fields. Choose the correct answer from the options given below:

• A. Both A and R are true and R is the correct explanation of A
• B. Both A and R are true but R is not the correct explanation of A
• C. A is true but R is false
• D. A is false but R is true

Hint:

Properties of Electromagnetic Waves: \[ \boxed{\text{Do not require a medium}} \] \[ \boxed{\text{Travel with speed } c=3\times10^8\,m/s} \] \[ \boxed{E \perp B} \] \[ \boxed{E \perp \text{Direction of Propagation}} \]

Answer 1

The Correct Option is A

Step 1: Examine the Assertion. Electromagnetic waves do not require any material medium for propagation. Hence they can travel through vacuum. \[ \boxed{\text{Assertion (A) is True}} \]

Step 2: Examine the Reason. EM waves are produced by mutually perpendicular oscillating electric and magnetic fields. \[ \boxed{\text{Reason (R) is True}} \]

Step 3: Determine the relationship. The changing electric field produces magnetic field and vice versa. Therefore EM waves are self-propagating and do not require a medium. Thus Reason correctly explains Assertion. Hence, \[ \boxed{\text{Both A and R are true and R is the correct explanation of A}} \] Therefore, \[ \boxed{\text{(A)}} \] is the correct answer.