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kherson [118]
3 years ago
12

How much energy does a 9 x 10^8m wavelength photon have?

Chemistry
1 answer:
murzikaleks [220]3 years ago
6 0
<h3>Answer:</h3>

2.21 × 10^-18 Joules

<h3>Explanation:</h3>

<u>We are given;</u>

  • Wavelength of a photon  as 9 × 10^-8 m

We are required to calculate the energy of the wave.

  • Energy of a photon is given by the formula;
  • E = hf , but f = c/λ

Thus, E = hc/λ

where, h is the plank's constant , 6.626 × 10^-34 J-s , c is the speed of light, 2.998 × 10^8 m/s, and λ is the wavelength.

Therefore;

E = (6.626 × 10^-34 J-s × 2.998 × 10^8 m/s) ÷ 9 × 10^-8 m

   = 2.21 × 10^-18 Joules

Thus, the energy of the photon is 2.21 × 10^-18 Joules

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