Question

The formula f equals c over lambda, where f = frequency, c = wave speed, and λ = wavelength, is used to calculate frequency. Solve this formula for c.

A.c = f − λ
B.c = fλ
C.c = f + λ
D.c equals f over lambda

Answer 1

Explanation:

if f = c/lambda

then c = f × lambda

Answer 2

B. c = fλ

Explanation:

Given formula,

f equals c over lambda,

`\implies f=(c)/( \lambda)`

Where, f = frequency,

c = wave speed,

λ = wavelength,

By the above formula,

`f* \lambda = c` ( By cross multiplication ),

Hence, the required formula for c,

`c=f\lambda`

Option 'B' is correct.