His post wasn't all that clear - perhaps he meant the rate of energy radiation, not the speed of the photons themselves. In that case, the answer is no - it depends on the material and temperature.Originally posted by Integral
Yes, Infrared is electroMagnetic energy therefore it travels at c, the speed of light.
Heat can transfer by radiation through electromagnetic waves, specifically infrared radiation. These waves carry thermal energy from a warmer object to a cooler one.
Examples of heat transfer by radiation include feeling the warmth from the sun on your skin, feeling the warmth from a fire, and using a microwave to heat up food.
No, heat transfer by radiation does not require a medium. Unlike conduction and convection, which require a medium such as a solid, liquid, or gas, radiation can occur through empty space.
The rate of heat transfer by radiation is affected by the temperature difference between the two objects, the surface area of the objects, and the type of material the objects are made of. Objects with a larger temperature difference and larger surface area will transfer heat more quickly through radiation.
Yes, heat transfer by radiation is important in everyday life. It is responsible for heating our planet, cooking our food, and even keeping us warm when we sit next to a fire. It is also used in various technologies such as solar panels and thermal imaging cameras.