Question

If the wavelength of the blue light is 1.50 × 10^3 nm. How much energy does one photon of this light carry?

(Planck’s constant h = 6.626 × 10-34 J・s)

choices:

1.8 ×10^-10 J

1.3 ×10^-19J

2.6 ×10^-20 J

2.3 ×10^-9 J

Answer 1

Answer:

Before we go any further, let's convert this to meters. This is the energy of a single photon of 475 nm blue light. We need 2 x 10-17 J of energy to begin the process.