Question

can you help with this please

A molecule absorbs photons of electromacnetic radiation with an enersy of 3.99x10-14). What's the wavelength of the electromagnetic radiation, in meters ?

Answer 1

We know that, from Planck's equation,

$E= h\frac{c}{\lambda }$​

Where E is the energy of radiation (3.99×10-19 J).

h is the planck's constant (6.626×10-34 J. S).

C is the velocity of electromagnetic radiation (3×108​​​​​m/s).

$\lambda$ is wavelength of radiation.

Hence from above equation we can write,



= v

= (6.626)(10-34)J.s(3) (10%)m.s-1 (3.99) (10-19) J

$\lambda=$ 498.2×10-9 m

Hence wavelength of the radiation is 498.2×10-9m.