Quantized Energy and Photons

Use Wien’s displacement law to find the surface temperature of the star Rigel, given that its blackbody radiation peak occurs at a frequency of 1.17 × 10¹⁵ Hz.

• 17,900 K

• 18,900 K

• 19,900 K

• 20,900 K

What is the peak frequency of blackbody radiation for an object with a temperature of 2500 K?

• 1.5 × 10¹¹

• 1.5 × 10¹²

• 1.5 × 10¹³

• 1.5 × 10¹⁴

An oscillator has a quantum number of 8.6 × 10³² and a frequency of 1.5 Hz. What is the energy of this oscillator?

• 0.86 N

• 0.20 J

• 0.86 J

• 2.5 N

A pendulum oscillates with a frequency of 0.50 Hz and an energy of 0.75 J. What is the quantum number for this pendulum?

• 5.3 × 10³³

• 4.3 × 10³³

• 3.3 × 10³³

• 2.3 × 10³³

What is the frequency of light whose photons each have an energy of 2.5 × 10^-19 J?

• 2.8 × 10¹⁴ Hz

• 3.8 × 10¹⁴ Hz

• 3.8 × 10¹⁴ s

• 38 × 10¹⁴ Hz

An infrared photon has a frequency of 1.00 × 10¹³ Hz. How much energy is carried by 1 mole of these photons?

• 3990 J

• 5000 J

• 2000 J

• 800 J

The frequency of a photon is 8.2 × 10¹⁴ Hz. What is the energy of this photon, in electron volts?

• 3400 eV

• 34 eV

• 4.3 eV

• 3.4 eV