Question

A wave travels at a speed of 330m/s . if the wavelength is 2.2cm ,what will be the frequency of the wave?

Answer 1

Given:-

• Speed of wave,S = 330m/s

• Wavelength , λ = 2.2 cm

To Find:-

• Frequency of the wave ,f

Solution:-

As we know that

•S = fλ

Substitute the value we get

→ 330 = f×2.2

→ f = 330/2.2

→ f = 150 Hz

Therefore, the frequency of the wave is 150 Hertz.

Additional Information !!

• A Periodic variation in the value of quantity between a maximum value and minimum value is called oscillation.

• Sound is a form of energy which provides us sensation of hearing.

• The minimum distance of after which the state of disturbance is repeated in wave motion is called the wavelength of the wave.

• The time taken to complete one oscillation of the density of the medium is called the time period of the sound.

Answer 2

Aɴsᴡᴇʀ:

• The required frequency = 150 Hz

Gɪᴠᴇɴ:

• A wave travels at a speed of 330m/s.
• The wavelength is 2.2cm.

Nᴇᴇᴅ ᴛᴏ ғɪɴᴅ:

• The required Frequency = ?

SOLUTION:

Fᴏʀᴍᴜʟᴀ ᴜsᴇᴅ ʜᴇʀᴇ:

• Speed = Frequency × Wavelength

Pᴜᴛᴛɪɴɢ ᴛʜᴇ ᴠᴀʟᴜᴇs:

$\longrightarrow \sf {330 = Frequency \times 2.2}$

$\longrightarrow \sf {Frequency = \cancel\dfrac{330}{2.2}}$

$\longrightarrow \sf {Frequency = 150 \:Hertz}$

Tʜᴇʀᴇғᴏʀᴇ:

• The required frequency = 150 Hz

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