pr1nc3jay pr1nc3jay

20-09-2018
Chemistry

contestada

What is the wavelength of light (in nm) if 1.21x10^21 photons have a total energy of 432 J?

Respuesta :

20-09-2018

The wavelength is 556 nm.

Energy per photon = 432 J/1.21 × 10²¹ photons = 3.570 × 10⁻¹⁹ J/photon

fλ = c, so f = c/λ

E = hf = (hc)/λ

λ = (hc)/E = (6.626 × 10⁻³⁴ J·s × 2.998 × 10⁸ m·s⁻¹)/3.570 × 10⁻¹⁹ J = 5.56 × 10⁻⁷m = 556 nm

Answer Link

Otras preguntas

in sunlight, a vertical stick has a height of 4 ft and casts a shadow 2 ft long at the same time that a nearby tree casts a shadow 18 ft long. how tall is the t

what s the answer? 16x-12x=2

an extended period of well below average rainfall known as a

Which statement describes an accomplishment of President Theodore Roosevelt? A. He led the United States to victory over Germany during World War I. B. He put A

Because the desert air was very dry, the bread became stale very rapidly. 13. In this sentence, what clue word best tells you that a cause is producing an eff

rebecca bought one gold fish for $32 and one starfish for $12. she spends the rest of her money on guppy fish. she wants to spend no more than $80. each guppy c

How does the Earth’s tilt affect the seasons?

where did portugal and spain claim land in the western hemisphere?

What number multiplies to 126 but also adds to 23.

Let f(x) = 2x - 6. Solve f-1(x) when x = 2.