Intensity is how much energy arrives at a surface each second. True or false.
Answer
True
False
Question 2
Question
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].
Answer
less
more
no
more spread out
closer together
Question 3
Question
What is electromagnetic radiation?
Answer
Electromagnetic radiation is the transfer of energy from one point to another.
Electromagnetic radiation is how much energy arrives at a surface each second.
Question 4
Question
Energy is transferred in something called [blank_start]photons[blank_end] (small packets of energy).