Question

Which color of light has a wavelength of
5.0 × 10^–7 meter in air?
(1) blue (3) orange
(2) green (4) violet

Answer 1

Green has a range of about 492nm-577nm, so I would say it's green.
A nanometer is 1x10^-9 of a meter, by the way.

Answer 2

Answer:

Green              

Explanation:

We have given that, the wavelength is $5\times 10^{-7}\ m$ in air. We have to write the color that corresponds to this wavelength.

The given wavelength lies in visible region of spectrum. The visible region lies in between 380 nm to 740 nm. The wavelength of violet color is least while the wavelength of red color is maximum.

$\lambda=5\times 10^{-7}\ m=500\ nm$    

The above wavelength corresponds to green color. Its wavelength lies from 500 nm to 565 nm. Hence, teh correct option is (c) " green ".