Question

The electric field associated with an electromagnetic radiation is given by E = a(1 + cosω1t)cosω2t. Which of the following frequencies are present in the field?

• A. ω1
• B. ω1+ω2
• C. |ω1+ω2|
• D. ω2

Answer 1

Answer: (B), (C), (D)

ω1+ω2

Answer 2

The correct option is (B): ω1+ω2, (C): |ω1+ω2| and (D): ω2