Question

A standing wave is created in a microwave oven by reflecting microwaves from the walls of the oven. The cold spots, the nodes in the microwave standing wave, are found to be 6 cm apart. What is the frequency of the microwaves? [Ans: 2.5 * 109Hz]​

Answer 1

The frequency of the wave is given as 2.5 * 10^9 Hz.

What is wavelength?

The term wavelength is the distance that is covered by a wave. It is also referred to as the distance between two successive crests or two successive troughs. It can also be defined as half of the distance between two nodes.

Now nodes are the points in which there is no movement while antinodes are the points in which there is movement.

Given that;

c = λf

c = speed of light =  3 * 10^8 m/s

λ = 2(6cm) = 12 cm or 12 * 10^-2 m

f = ??

Thus;

f = c/ λ

f =  3 * 10^8 m/s/12 * 10^-2 m

f = 2.5 * 10^9 Hz

Learn more about speed of light:brainly.com/question/394103

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