22. What is the main source of UV light?
C. Sun
A. Fluorescent light D. UV lamp
B. Incandescent light

23. Satellite Communication is an application of what type of wave?

A. Infrared C Radio wave.
B. Microwave D. X-ray

24. Which of the following forms of electromagnetic waves is used in sterilization of medical equipment?

A. Gamma ray C. Ultraviolet
B. Microwave D. X-ray

25. What light is produced from heat?

A. Fluorescent light C. Neon lights
B. Illuminated light D. Incandescent light

26. The photosynthesis is a process by which green plants make food. This process used what type of EM waves?

A. Gamma ray C. Ultraviolet
B. Microwaves D. Visible light

27. What form of EM wave is useful in diagnosing bone fracture and Tumors?

A. Gamma ray C. Visible light
B. UV light D. X-ray

28. Which EM wave is emitted by stars and some radioactive substances?

A. Gamma ray C. Visible light
B. UV light D. X-ray

29. Which type of EM wave is also called the penetrating radiation?

A. Microwave C. UV light
B. Radio wave D. X-ray

30. What form of EM wave that is useful in nuclear engineering?

A. Gamma ray C. UV light
B. Microwave D. X-ray​