Question
Physics Question on Electromagnetic waves
The condition under which a microwave oven heats up a food item containing water molecules most efficiently is :
A
Infra-red waves produce heating in a microwave oven
B
The frequency of the microwaves must match the resonant frequency of the water molecules
C
The frequency of the microwaves has no relation with natural frequency of water molecules
D
Microwaves are heat waves, so always produce heating
Answer
The frequency of the microwaves must match the resonant frequency of the water molecules
Explanation
Solution
It is electromagnetic wave, therefore the correct choice is