Question
Physics Question on Waves
What should be the length of a half-wave dipole antenna for a carrier wave having frequency 3×108 Hz?
A
(A) 0.5 m
B
(B) 5 m
C
(C) 1 m
D
(D) 0.1 m
Answer
(A) 0.5 m
Explanation
Solution
Explanation:
Given:Frequency of the carrier wave =3×108 HzWe have to find the length of a half-wave dipole antenna.Let L be the length of the half-wave dipole antenna. ThenL=λ2⇒L=c2ν Using [c=νλ]⇒L=3×1082×3×108=0.5 mHence, the correct option is (A).