Electromagnetic Waves and Their Applications

<p>Radio waves, Microwaves, Infrared, Visible light (C)</p> Signup and view all the answers

<p>They are only harmful and have no useful applications. (C)</p> Signup and view all the answers

<p>Thermal imaging (D)</p> Signup and view all the answers

<p>X-rays (B)</p> Signup and view all the answers

<p>Frequency decreases (D)</p> Signup and view all the answers

<p>Microwaves (D)</p> Signup and view all the answers

<p>Gamma rays (B)</p> Signup and view all the answers

The constant speed of all electromagnetic waves in a vacuum, approximately 3 x 10⁸ m/s.

The speed of an electromagnetic wave equals the product of its frequency and wavelength.

Electromagnetic waves with the longest wavelengths and lowest frequencies, used in radio broadcasting and mobile phone signals.

Electromagnetic waves used in microwave ovens and long-distance communication, with wavelengths shorter than radio waves but longer than infrared.

Electromagnetic waves detectable by the human eye, responsible for our ability to perceive the world around us.

The formula that relates wavelength and frequency is v = fλ, where v is the speed of light, f is the frequency, and λ is the wavelength.

Microwave ovens use electromagnetic waves with wavelengths shorter than radio waves but longer than infrared to heat food. The waves cause water molecules in food to vibrate, generating heat.

X-rays are electromagnetic waves with high energy and short wavelengths that can pass through most materials. They are used to image bones and examine internal structures.

Gamma rays can be used to sterilize water by damaging the DNA of harmful bacteria and microorganisms. This process kills them and makes the water safe to drink.

The entire range of electromagnetic waves, arranged in order of their wavelengths and frequencies. It includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.