Chemistry question

Question

5. A certain blue light has a frequency of 6.91 x 10 14

Hz. What is the wavelength of the light?

6. The energy for a quantum of light is 2.84 x 10-19

J. What is the wavelength of this light?

7. What is the frequency of green light, which has a wavelength of 4.90 x 10-7 m?

8. What is the wavelength of electromagnetic radiation having a frequency of 5.00 x 1012 Hz? What kind of electromagnetic radiation is this?

Answer 1

The relationship between wavelength and frequency is expressed as ƒ = c/λ, where ƒ = frequency, c = speed of light, and λ = wavelength. The exact value of c = 299792458 meters per second. Be sure to use meters as the unit for wavelength when calculating.

The relationship between energy and wavelength is expressed as E = hc/λ, with the above definitions, as well as h = Planck's constant. The exact value of h = 6.62607015×10⁻³⁴ J⋅s.