Electromagnetic waves

Question 1

an electric charge produces an

Answer 1

electric field.

Question 2

An oscillating charge will produce

Answer 2

oscillating electric field

Question 3

Electromagnetic waves or electromagnetic radiations, are produced

Answer 3

oscillating electric charges

Question 4

electromagnetic waves are

Answer 4

transverse waves

Question 5

v =

Answer 5

vacuum

Question 6

f =

Answer 6

frequency

Question 7

upside down v=

Answer 7

wavelength

Question 8

Is the continuous range of electromagnetic waves arranged in order of frequency or wavelength.

Answer 8

The electromagnetic (EM) spectrum

Question 9

Discovered by Heirich Hertz in 1887 longest of all electromagnetic waves, ranging from 10 m to 10 m. The frequency of these waves ranges from 30 kHz to 3000 MHz.

Answer 9

Radio waves

Question 10

acronym for radio detenction and ranging

Answer 10

Radar

Question 11

in the EM spectrum lies somewhere from 300 MHz to 300 GHz, with wavelength corresponding to 10 m to 10 m. James Clerk Maxwell is credited for discovering in 1864.
considered as high-frequency radio waves and are mainly used for communication, especially from 2 GHz to 40 GHz. They were mostly used for long-distance telephone calls before the introduction of optical fibers. They are also used to send signals for cable television as well as video or audio feeds from production vans to broadcast stations,

Answer 11

Microwave

Question 12

Infrared means

Answer 12

“below red.”

Question 13

have a lower frequency than the red part of the visible light. Their frequencies range from 3x 10” Hz to 4 x 10” Hz, with wavelengths ranging from 7.5 x 10 m to 10 m. Sir William Herschel, a British astronomer, discovered these rays in 1800.We do not seebut we feel it as heat. are used in remote controls for television sets, burglar alarm systems, night vision cameras, and certain types of thermometers. Most computers, laptops, palmtops, and printers are equipped with infrared data association ports that enable us to transfer and print data without connecting them with cable.

Answer 13

Infrared Waves

Question 14

in the range of 4 x 104 Hz to 8x 10” Hz with corresponding wavelengths of 4 x 10 m to 8 x 10 m are the only ones seen by our naked eye.

Answer 14

Visible Light

Question 15

The sequence of colors of visible light from longest to shortest may be remembered by the acronym

Answer 15

ROYGBIV

Question 16

with frequencies ranging from m 8x10 Hz to 10 Hz. which was discovered by the German physicist Johann Wilhelm Ritter wavelengths ranging from 6x100 to 4x 10 m. There are three kinds of UV: UVA, UVB, and UVC. UVA has a wavelength range of 515 am to 400 nm; UVB, from 280 nm to 314 nm, and UVC, from 60 nm to 279 nm. UVC is almost completely absorbed by the atmosphere and does not reach the Earth’s surface. UVB is filtered by the ozone in the atmosphere. UVA accounts for 95% of the solar UV reaching the Earth.
A major source of ultraviolet rays is the sun. Special lamps also emit UV rays, UV lights, more popularly known as black light, are used to detect forged bank notes. Black light makes visible the security marker ink that we use for our signatures in our bankbook. It is used during forensic investigations at crime scenes, in procedures like searching for traces of blood and other body fluids, fingerprints, and footprints. Black light is also used to sterilize medical equipment and purify water. It is also used in pest-control devices and fly traps, as well as in theaters to produce the “glow in the dark” effect.

Answer 16

Ultraviolet Radiation

Question 17

Ultraviolet radiation is more popularly known as

Answer 17

UV

Question 18

are sometimes called Roentgen rays, after their discoverer, the German physicist Wilhelm Conrad Roentgen. The letter X is normally used to represent an unknown quantity. Roentgen called the rays that he discovered this because he did not know their nature or origin. He was awarded the 1901 Nobel Prize for physics for his accidental discovery of this

Answer 18

X-rays

Question 19

s are given off by radioactive materials like cobalt-60 and cesium-137. Astronomical objects, including the sun, clouds of interstellar matter, and remnants of supernovae, are sources of ________ are highly penetrating because of their very short wavelengths, ranging from less than 10 m to 100 m. Paul Villard, a French chemist and physicist, is recognized as having discovered gamma rays in 1900.
are used in industries to detect cracks in metals and to sterilize equipment and commercial products. Noncontact industrial sensors using gamma sources are used in the refining, mining, chemical, food, soaps and detergents, as well as pulp and paper industries to control volume levels, density, and thickness. Food irradiation with gamma rays kills bacteria, insects, and parasites

Answer 19

Gamma rays

Question 20

What are all the different waves from greatest to least

Answer 20

Radio wave
Microwave
Infrared waves
Visible light
Ultraviolet
X rays
Gamma rays

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