Name: ______TP: ______
Formulae: Units for all variables:
Question 1: Find the frequency of a wave with a wavelength of 434.2 nm
Step 1: Convert 434.2 nm to meters.
Step 2: Rearrange the formula to solve for frequency.
Step 3: Plug in your values for the variables.
Step 4: Cancel units.
Step 5: Solve.
Question 2: How much energy is contained in one photon of the light from Question 1?
Step 1: Figure out which formula to use.
Step 2: Plug in your values for the variables.
Step 3: Make sure your units cancel.
Step 4: Solve.
Question 3: What color light is emitted from an electron in a hydrogen atom that jumps from E3 to E1 (energy 3.03 x 10-19 J).
Step 1: Plan - Determine which formula you need to use.
Step 2: Calculate the frequency of light.
Step 3: Calculate the wavelength of light.
Step 4: Make sure your units cancel and solve.
Practice (complete on LL):
1. Calculate the frequency of light produced from a wavelength of 600 nm. What color light is this?
2. Calculate the wavelength of light with a frequency of 5.092 x 1014 Hz.
3. Calculate the frequency of light produced from a wavelength of 400 nm. What color light is this?
4. Calculate the wavelength of light with a frequency of 1.020 x 1014 Hz. Is this light in the visible spectrum?
5. What energy light is produced from a frequency of 1.020 x 1014 Hz?
6. What energy light is produced from a frequency of 5.092 x 1014 Hz?
7. What energy of light is produced from a particle with a wavelength of 300 nanometers?
8. What is the increment of energy produced from an electron transition that produces green light? (Hint: Use the EM Spectrum)
9. Back when Ms. Kalenda was a child, people used cd players to listen to music. The laser in an audio CD player uses light with a wavelength of 780 nm. Calculate the frequency of this light.
10. Challenge: Microwave radiation has a wavelength on the order of 1.0 cm. a) Calculate the frequency and the energy of a single photon of this radiation. B) Calculate the energy of 6.022 x 1023 photons of this radiation.