Answer
option D)
Microwave
Explanation
In the formula
E=ℎv
the v denotes frequency,
the E denotes energy,
the h is Plank's constant
As we can see from the equation that the frequency is proportional to the energy.
So, we can conclude that the electromagnetic wave which have lowest frequency will have the lowest energy.
EM waves Frequency
gamma rays >3×10^17
X-rays 3×10^16 – 3×10^17
ultraviolet light 7,5×10^14 – 3×10^16
visible light 4,3×10^14 – 7,5×10^14
infrared 3×10^12 – 4,3×10^14
microwave 3×10^9 – 3×10^12
Microwave have lowest frequency band, hence it have lowest energy
