If v = speed, f = frequency,
$λ$ = wavelength and T = time period, then which of the following expression(s) is/are correct?

v = f λ

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v = \frac{λ}{T}

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v λ = f

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λ = v f

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Solution

The correct options are
A $v = f λ$
B $v = \frac{λ}{T}$
The speed of a wave is the product of its frequency and wavelength.
$v = f λ$

Frequency is the inverse of time period.
$f = \frac{1}{T}$

$⟹ v = \frac{λ}{T}$

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If v = speed, f = frequency, λ = wavelength and T = time period, then which of the following expression(s) is/are correct?

The correct options are A v=fλ B v=λTThe speed of a wave is the product of its frequency and wavelength. v=fλ Frequency is the inverse of time period. f=1T ⟹v=λT

If v = speed, f = frequency,
$λ$ = wavelength and T = time period, then which of the following expression(s) is/are correct?

The correct options are
A $v = f λ$
B $v = \frac{λ}{T}$
The speed of a wave is the product of its frequency and wavelength.
$v = f λ$

Frequency is the inverse of time period.
$f = \frac{1}{T}$

$⟹ v = \frac{λ}{T}$