Electromagnet Spectrum – Online MCQs – Physics 10th

1. The velocity of light in a diamond is: (whereas the refractive index of a diamond with respect to vacuum is 2.5)

2. Which of these electromagnetic waves has a high frequency?

3. The electromagnetic rays used in radiotherapy to destroy cancer cells are:

4. This colour has its own refracted path in the air and becomes distinct on the spectrum

5. They are produced when fast moving electrons lose their energy quickly.

6. The waves that have maximum penetrating power to treat tumours are:

7. A narrow beam of white light passes from air into the glass and is refracted. The wave characteristic remains unchanged in its:

8. Vibrating atoms in a hot, glowing bulb filament emit:

9. Stars are natural transmitters of:

10. The structure of solids is investigated by using:

11. Electromagnetic waves are:

12. The human body also gives out:

13. They are produced when the nuclei of unstable atoms decay into a stable nucleus or lose energy.

14. Which statement is TRUE about the red light?

15. The type of waves that are used in the television remote controllers:

16. Which of the following statement is false for the properties of electromagnetic waves?

17. Which of the following electromagnetic waves is used in medicine to destroy cancer cells?

18. Which of the following has a minimum wavelength?

19. What are the two colours that emerge from Prism’s two extreme ends?

20. Choose the electromagnetic wave that is the most dangerous to humans.