Microwaves — Prelims Questions

Which of the following phenomena is primarily responsible for heating food in a microwave oven?

A microwave oven operates at a frequency of $2.45,\text{GHz}$. What is the wavelength of these microwaves in vacuum? (Given: Speed of light $c = 3 \times 10^8,\text{m/s}$)

Which of the following devices is NOT primarily used for generating microwaves?

Which of the following applications correctly utilizes the property of microwaves being reflected by metallic surfaces?

If a microwave signal travels from Earth to a satellite at an altitude of $36,000,\text{km}$, how long does it take for the signal to reach the satellite? (Assume speed of light $c = 3 \times 10^8,\text{m/s}$)

Which of the following statements about microwaves is INCORRECT?