Electromagnet Spectrum – Online MCQs – Physics 10th

1. Which statement is TRUE about the red light?

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

3. The type of electromagnetic wave used in security scanners at night is:

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

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

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

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

8. Light year is a unit of:

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

10. The human body also gives out:

11. They are highly penetrating that can pass through flesh but not bones.

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

13. The list that shows electromagnetic waves in order of increasing wavelength is:

14. The white light consists of:

15. Which among the following has the maximum penetrating power?

16. The colour that is least deviated by a prism:

17. Electromagnetic waves are:

18. Select the correct statement(s) from the following:
(i) Wavelength of microwaves is greater than that of ultraviolet rays
(ii) The wavelength of infrared rays is lesser than that of ultraviolet rays
(iii) The wavelength of microwaves is lesser than that of infrared rays
(iv) Gamma ray has the shortest wavelength in the electromagnetic spectrum

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

20. This colour has a maximum speed in the glass prism, with the slightest deviation.