IG Phy –  Transfer of Thermal Energy (II)

Radiation does not need particles to transfer thermal energy from one place to another.

Radiated thermal radiation is carried mainly by visible light.

Hot objects radiate more infrared radiation than cold objects.

Shiny white surfaces are excellent reflectors of thermal radiation.

Dull black surfaces are poor emitters and absorbers of infrared radiation.

The rate of emission of infrared radiation increases with higher surface temperature and larger surface area.

A black-colored can will emit less infrared radiation than a white-colored can.

Greenhouse gases in the atmosphere absorb and re-emit infrared radiation, contributing to the warming of the Earth.

Venus\’s higher temperature compared to Earth is mainly due to its closer proximity to the Sun.

A radiator in a room transfers most of its thermal energy by convection.