Infrared heaters send out _____ energy in the form of invisible infrared waves that travel in straight lines through the air.

Infrared heaters send out _____ energy in the form of invisible infrared waves that travel in straight lines through the air.

Infrared heaters send out _____ energy in the form of invisible infrared waves that travel in straight lines through the air.




a. Convection
b. Conduction
c. Radiant
d. Microwave
e. Electrical






Answer: C


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