Question

the green line in the atomic spectrum of thallium has a wavelength of 535 nm

Answer 1

Question:

The green line in the atomic spectrum of the thallium atom has a wavelength of 535 nm. Calculate the energy, in joules, of the photon with this wavelength. (c = 3 * 10^8 m/s) & (h = 6.626 * 10^-34 J * s)

ANSWER

$E=hf$

But $F=\frac{c}{\lambda}$

$E=h\frac{c}{\lambda}$

$=\frac{6.626×10^{-34}×3×10^8}{535×10^{-9}}$

$=3.176×10^{-19}J$