Physics, 24.03.2020 20:00, layja20

An electromagnetic wave of wavelength 14m is best classified as _.

A. a radio wave
B. infrared radiation
C. ultraviolet radiation
D. a gamma ray

Answers: 1

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answered: lujaynsparkles

A) Radio wave

Explanation:

Electromagnetic waves are periodic oscillations of the electric and the magnetic fields in a plane perpendicular to the direction of motion the wave. (they are transverse in nature).

All electromagnetic waves travel in a vacuum at the same speed, the speed of light:

$c=3.0\cdot 10^8 m/s$

Moreover, electromagnetic waves are classified into 7 different types, depending on their wavelength/frequency. From the shortest to the longest wavelength (highest to lowest frequency), they are:

Gamma rays

X rays 1nm-1pm

Ultraviolet 380 nm - 1 nm

Visible light 750 nm - 380 nm

Infrared radiation $25 \mu m - 2.5 \mu m$

Microwaves $1 mm - 25 \mu m$

Radio waves 1 mm

As we can see from the table, radio waves are the electromagnetic waves with longest wavelength, as their wavelength is larger than 1 mm (can be either several metres or several kilometres). Therefore, the wave in the problem (14 m) is an electromagnetic wave.

Radio waves are generally used for long-distance telecommunications (satellite or TV communications).

answered: Guest

technology is the collection of techniques, skills, methods, and processes used in the the merriam-webster learner's dictionary offers a definition of the term: "the use of moreover, these technologies have become so complex that entire fields more recently, modern works of science fiction such as those by philip k.

explanation:

answered: Guest

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by mathematical calculations before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of uranus led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

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Do you know the correct answer?

An electromagnetic wave of wavelength 14m is best classified as _.

A. a radio wave
...