The entire electromagnetic spectrum is given by radio waves, microwaves, infrared radiation, visible light, ultra-violet radiation, X-rays, gamma rays and cosmic rays in the increasing order of frequency and decreasing order of wavelength.
Q1: Which of the following has a minimum wavelength?
- Gamma rays
- Blue light
- Infrared rays
- microwave
Answer: (a) Gamma rays
Q2: Which among the following has the maximum penetrating power?
- Radio waves
- Microwaves
- Ultraviolet radiation
- Gamma rays
Answer: (d) Gamma rays
Q3: Which of the following is called heat radiation?
- X-rays
- Gamma rays
- Microwave
- Infrared radiation
Answer: (d) Infrared radiation
Q4: Which of the following are not electromagnetic waves?
- Cosmic rays
- Gamma rays
- β rays
- X rays
Answer: (c) β rays
Q5: 10 cm is the wavelength corresponding to the spectrum of
- Infrared rays
- Ultraviolet rays
- Microwaves
- X-rays
Answer: (c) Microwaves
Q6: The structure of solids is investigated by using
- Microwaves
- Gamma rays
- X-rays
- Infrared rays
Answer: (c) X-rays
Q7: Which radiations are used in the treatment of muscle ache?
- Infrared
- Ultraviolet
- Microwave
- X-rays
Answer: (a) Infrared
Q8: The ultra-high frequency band of radio waves in the electromagnetic wave is used as in
- Television
- Cellular phone communication
- Commercial FM radio
- Both a and b
Answer: (b) Cellular phone communication
Q9: The waves used by artificial satellites for communication is
- Microwaves
- Infrared waves
- Radio waves
- X rays
Answer: (a) Microwaves
Q10: Which of the following electromagnetic waves is used in medicine to destroy cancer cells?
- IR-rays
- Visible rays
- Gamma rays
- Ultraviolet rays
Answer: (c) Gamma rays
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