Question

A metal was burned and found to give of a violet color with a wavelength of

453nm. What is the energy of the light needed to excite the electrons in the atom?

Answer 1

E = 0.04 × 10⁻¹⁷j

Step-by-step explanation:

Given data:

Energy of photon = ?

Wavelength of photon = 453 nm (453×10⁻⁹m)

Solution:

E = h.c / λ

E = 6.63× 10⁻³⁴m² kg/s × 3×10⁸ m/s /453×10⁻⁹m

E = 19.89 × 10⁻²⁶ kg. m³ /s² / 453×10⁻⁹m

E = 0.04 × 10⁻¹⁷j