Question

When Xavier places his hands near a light bulb, he notices that certain areas around the light bulb are warmer than others. Which best explains this?

The areas to the sides of the light bulb are warmest because of conduction.

The areas to the sides of the light bulb are warmest because of convection.

The area directly above the light bulb is warmest because of conduction.

The area directly above the light bulb is warmest because of convection.

Answer 1

The area directly above the light bulb is warmest because of convection. Convection is a heat transfer by mass motion of fluid (like air), and it convection above a hot surface occurs because hot air expands, becomes less dense, and rises. The statement can be supported by the ideal gas law.