Please enable JavaScript.
Coggle requires JavaScript to display documents.
P2.1-P2.5 (Infrared Radiation (Infrared waves are part of the…
P2.1-P2.5
Infrared Radiation
Infrared waves are part of the electromagnetic spectrum. They are the waves with wavelengths a little longer than the wavelength of the visible red light. We can detect infrared radiation with our skin - it makes us feel warm.
-
The hotter an object is, the more infrared radiation it emits at a given time.
-
-
A perfect black body is also the best possible emitter of radiation. The radiation emitted by a perfect black body is called black body radiation.
-
The intensity of the radiation that an object emits has a peak at a certain wavelength. This peak wavelength depends on the temperature of the object.
-
-
Specific Heat Capacity
When you heat a substance, you transfer energy to it. This increases its temperature. The specific heat capacity of the substance is the amount of energy required to raise the temperature of 1kg of the substance by 1°C (degree Celsius).
Th greater the specific heat capacity of a substance, the more energy you would need to supply to the substance in order to increase its temperature by 1°C.
For a given substance, a greater mass requires more energy to increase its temperature by 1°C.
You can calculate the energy required to change the temperature of a substance by a set amount, ΔE, using the equation ΔE = mcΔθ, where:
-
-