A camper standing several meters from a campfire feels her face warming even though…
PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
A camper standing several meters from a campfire feels her face warming even though the surrounding air temperature is only slightly above ambient. Which of the following best explains the dominant way thermal energy from the fire reaches her face?
(a) Hot air rising from the fire convects toward her face faster than it cools with the surrounding air.
(b) Visible light emitted by the flames transfers most of the thermal energy directly to her skin.
(c) Infrared radiation emitted by the flames travels directly to her skin.
(d) Heated smoke particles collide with air molecules, which then conduct energy to her face.