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* 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=(hc)/(\lambda)\\\\E=(6.63* 10^(-34)* 3* 10^8)/(4.5* 10^2* 10^(-9))\\\\=4.42* 10^(-19)\ J`

So, the required energy is
`4.42* 10^(-19)\ J`.