Which of the following technologies would produce the most energy in light waves? a. halogen lightbulb b. radio-controlled toy airplane c. microwave industrial drying equipment d. ultraviolet disinfecting wand

D. Ultraviolet disinfecting wand.

Explanation:

Energy in light waves depends upon the frequency o the waves. Higher the frequency of the waves, higher the amount of energy it carries. Similarly, waves with shorter wavelength has higher frequencies and thus more energy.

Ultraviolet disinfecting wand would produce most energy out of the four options because it produce UV waves which have shorter wavelength and higher frequency.

need to see circuit to get time constant