Question

The brilliant red colour seen in fireworks is due to the emission of red light at a wavelength of 650 nm. What is the energy of one photon of this light? (c = 3 x 108 ms⁻¹ , h = 6.626 x 10-34 Js)

Answer 1

The energy of one photon of red light at a wavelength of 650 nm is approximately 3.05 x 10^-19 joules, calculated using the relationship E = h*c/lambda with Planck's constant and the speed of light.

Step-by-step explanation:

The brilliant red colour seen in fireworks is due to the emission of red light at a wavelength of 650 nm. To calculate the energy of one photon of this light, you can use the equation E = h∗c/λ, where 'E' is the energy, 'h' is Planck's constant (6.626 x 10-34 J·s), 'c' is the speed of light (3 x 108 m/s), and 'λ' is the wavelength of light.

To find the energy of one photon with a wavelength of 650 nm (which is 650 x 10-9 m), you would plug in the values and calculate:

E = (6.626 x 10-34 J·s) ∗ (3 x 108 m/s) / (650 x 10-9 m)

After calculation, you will find that the energy of one photon of red light with a wavelength of 650 nm is approximately 3.05 x 10-19 joules.