Intensity is how much energy arrives at a surface each second. True or false.
Respuesta
True
False
Pregunta 2
Pregunta
If the surface area increases, there are [blank_start]less[blank_end] photons hitting per square metre, they are [blank_start]more spread out[blank_end].
Respuesta
less
more
no
more spread out
closer together
Pregunta 3
Pregunta
What is electromagnetic radiation?
Respuesta
Electromagnetic radiation is the transfer of energy from one point to another.
Electromagnetic radiation is how much energy arrives at a surface each second.
Pregunta 4
Pregunta
Energy is transferred in something called [blank_start]photons[blank_end] (small packets of energy).