2 Answers

Karolis Ramanauskas · Answer 1 · 2018-12-19T13:29:03+0000

Wavelength of photon, λ = 3.8 × 10-7 meters

Frequency of photon,

Thus, energy of photon,

= 5.2276 × 10-19 joules

The energy of a photon having a wavelength of 3.8 × 10-7 meters is 5.2275 × 10-19 joules.

MrKew · Answer 2 · 2018-12-23T04:48:17+0000

Energy E = hc / l

where h = Planck's constant, c = speed of light and l = wavelength.

E = 1.986 * 10^-25 / 3.8 * 10^-7 = 5.223*10^-19

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