Electromagnetic Wave Calculations 2

Flashcards about Electromagnetic Wave Calculations

What equation relates energy (E) and frequency (f) of a photon?

E = hf, where h is Planck's constant.

What is the value of Planck's constant (h)?

6.63 x 10^-34 J-s

If a photon has a frequency of 8.1 x 10^14 Hz, what is its energy?

E = 5.37 x 10^-19 J

What is the equation to calculate frequency (f) when energy (E) and Planck's constant (h) are known?

f = E/h

If a photon has an energy of 1.2 x 10^-6 J, what is its frequency?

f = 1.81 x 10^27 Hz

If a photon has an energy of 7.0 x 10^-10 J, what is its frequency?

f = 1.06 x 10^24 Hz

What are the two equations combined for electromagnetic wave calculations?

c = λf and E = hf

How can the equation E=hf and c=λf be combined to relate energy (E), Planck's constant (h), speed of light (c), and wavelength (λ)?

E = hc/λ

What is the speed of light (c)?

3 x 10^8 m/s

If a photon has an energy of 5.1 x 10^-19 J, what is its wavelength?

λ = 3.9 x 10^-7 m

If a photon has a wavelength of 6.4 x 10^-7 m, what is its energy?

E = 3.11 x 10^-19 J