Arrange the following radiations in increasing order of their energy.
A. UV-A
B. UV-B
C. UV-C
D. Infrared
E. Microwave
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → E, D, A, B, C
Photon energy rises as wavelength falls. Across the spectrum the wavelength shortens in the order microwave (cm to mm) → infrared (700 nm–1 mm) → UV-A (400–315 nm) → UV-B (315–280 nm) → UV-C (280–100 nm).
So energy increases as Microwave < Infrared < UV-A < UV-B < UV-C, which is why UV-C is the most damaging and is absorbed almost entirely by the ozone layer.