Question

the frequency of line spectrum of sodium is 5.09 ×
10 power 14 \second its wavelength in NM will be if c equal to 3 × 10 power 3 M \second

Answer 1

The answer is 3.9*10^-31.
by using the formula frequency equals to hc/lambda.
hope it helps

Answer 2

Answer:

The wavelength of the line of the spectrum is 589 nm.

Explanation:

Frequency and wavelength are related to each other by the expression:

$\nu=\frac{c}{\lambda}$

where,

$\nu$ = Frequency of electromagnetic wave.

$\lambda$ = Wavelength if the electromagnetic light

c = speed of light = $3\times 10^8m/s$

Frequency of the line spectrum of sodium =$\nu =5.09\times 10^{14} s^{-1}$

Then the wavelength will $\lambda$

$=5.09\times 10^{14} s^{-1}=\frac{3\times 10^8 m/s}{\lambda }$

$\lambda =5.89\times 10^{-7} m=589\times 10^{-9} m=589 nm$

$1 m = 1\times 10^{9} nm$

The wavelength of the line of the spectrum is 589 nm.