Question

Which group contains only electromagnetic waves?

A light waves, radio waves, y-rays
B. light waves, radio waves, sound waves C. light waves, sound waves, y-rays
D. radio waves, sound waves, Y-rays​

Answer 1

Answer:

22 Which group contains only electromagnetic waves? A light waves, radio waves, γ-rays B light waves, radio waves, sound waves C light waves, sound waves, γ-rays D radio waves, sound waves, γ-rays Page 11 11 © UCLES 2015 0625/12/O/N/15 [Turn over 23 Two sounds X and Y are produced by loudspeakers.

Explanation:

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Answer 2

Answer: The correct option is  A. light waves, radio waves, y-rays. When an electric field and a magnetic field interact, Electromagnetic waves are created. Thus, they are referred to as "electromagnetic" waves. Radio waves, microwaves, infrared waves, X-rays, gamma rays, and other types of waves are EM waves.

Explanation:

• An electromagnetic wave's electric field and magnetic field are perpendicular to one another (at right angles). Additionally, they are perpendicular to the EM wave's direction.
• The highest point of a wave is referred to as the "crest," and the lowest point as the "trough." A variety of frequencies can be created by dividing up electromagnetic waves. The electromagnetic spectrum is what is meant by this.

• In vacuum, EM waves move at a fixed speed of 3.00 x 10⁸ ms⁻¹. Neither the magnetic field nor the electric field can deflect EM waves. They can, however, exhibit diffraction or interference.
• An electromagnetic wave can pass through any medium that includes vacuum, solid materials, and air. It can spread or move from one area to another without the use of a medium.
• Whereas, mechanical waves (like sound waves or water waves) require a medium to propagate.
• Transverse waves include EM waves. They are therefore measured by their amplitude (height) and wavelength (distance separating the highest and lowest points of two successive waves), respectively.

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