Question

The frequency of a green light is $6\times {10}^{-14}$ Hz. Its wavelength is

• A. 500 nm
• B. 5nm
• C. 50,000
• D. none of these

Answer 1

The correct option is A 500 nm

$c=\lambda \nu$

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

$\nu =\frac{3\times {10}^8}{6\times {10}^{-14}}=\frac{1}{2}\times {10}^{8-14}$

$=0.5\times {10}^{-6}$

$=5\times {10}^{-7}$

$=500\times {10}^{-9}$

$=500nm$