Blackbody Radiation and Wein’s Law – Practice

Questions:

1) How much energy does a photon from the visible spectrum have if it has a frequency of 4.72 × 1014 Hz?

2) How much energy does a photon from the ultraviolet spectrum have if it has a wavelength of 50nm?

3) The surface temperature of the Sun is approximately 5800 K. What is the wavelength of the most intense light emitted by the surface of the Sun?

4) The temperature of a vehicle monitored by an infra-red camera is 20°C. What is the energy of a photon that is detected by this camera?

Quick Answers:

1) 3.13 × 10-19 J

2) 3.98 × 10-18 J

3) 5.0 × 10-7 m (500 nm)

4) 2.0 × 10-20 J 

 

Worked Answers:

Close Menu