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Q: 1 Write down in order seven colors of visible light in increasing wavelength.
Q: 2 Define electromagnetic waves.
Q: 3 In electromagnetic spectrum, which region exists between infrared and microwaves.
Q: 4 In electromagnetic spectrum, which region exists between ultraviolet and gamma rays.
Q: 5 Which region of the electromagnetic spectrum has a greatest frequency and shortest wavelength?
Q: 6 Which region of the electromagnetic spectrum has a shortest frequency and greatest wavelength?
Q: 7 Define dispersion of light.
Q: 8 Define electromagnetic spectrum.
Q: 9 Write down at least two applications of each part of electromagnetic spectrum.
Q: 10 Which color of the visible light has highest frequency?
Q: 11 Which electromagnetic wave has the highest energy?
Q: 12 Which of these types of electromagnetic waves has the highest energy?
Microwaves, Radio waves, Infrared
Q: 13 Which of these types of electromagnetic waves has the lowest frequency?
Gamma, X-rays, Ultraviolet
Q: 14 What can split white light into its constituent colours?
Protractor, Prism, Disperser
Q: 15 Which type of electromagnetic radiation is used to sterilise food?
Q: 16 What type of electromagnetic waves is used by mobile phones?
Q: 17 What are the common characteristics of electromagnetic radiations?
Q: 18 Which part of the electromagnetic spectrum helps our eyes to see the object.
Q: 19 Name the ray emitted by the sun and other white hot objects, exposure to which can burn the skin and cause skin cancer?
Q: 20 What is the speed of light in air or vacuum?