When sodium is excited in a flame, two ultraviolet spectral lines at lambda - 372.1 nm and lambda = 376.4 nm respectively are emitted . which wavelength represented photons?
a) higher energy?
b) longer wavelengths?
c) higher frequences?

Wavelength which represented photons with :

a) Higher energy is 372.1 nm

b) Longer wavelength is 376.4 nm

c) Higher frequency is 372.1 nm

Explanation:

(Planck's equation)

= wavelength of the photon with energy E in meters.

= frequency of the photon with energy E in hertz.

For first spectral line:

joules

Hertz

For second spectral line:

joules

Hertz