Question

A wave travels with a speed of 78m/s in air and it has a frequency of 42hz. What is the wavelength of this wave?

Answer 1

The wavelength of this wave is 1.857 m.

Explanation:

We can use the formula:

`\sf\qquad\dashrightarrow Wavelength = (Speed\: of\: wave)/(Frequency)`

where:

• Speed of wave = 78 m/s
• Frequency = 42 Hz

Substituting these values, we get:

`\sf:\implies Wavelength = (78\: m/s)/(42\: Hz)`

`\sf:\implies \boxed{\bold{\:\:Wavelength = 1.857\: m\:\:}}\:\:\:\green{\checkmark}`

Therefore, the wavelength of this wave is 1.857 m.