Question

The blue color in some fireworks occurs when copper(I) chloride is heated to approximately 1500 K and emits blue light of wavelength 4.50 X 10 squared nm. How much energy of one photon of this light carry?

Answer 1

Given that,

Temperature, T = 1500 K

Wavelength, $\lambda=4.5\times 10^2\ nm$

To find,

The energy of one photon of this light.

Solution,

We know that, the energy of a photon is given by the formula as follows :

$E=\dfrac{hc}{\lambda}\\\\E=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{4.5\times 10^2\times 10^{-9}}\\\\=4.42\times 10^{-19}\ J$

So, the required energy is $4.42\times 10^{-19}\ J$.