Electromagnetic waves room invisible develops of power that take trip though the universe. However, you can "see" some of the outcomes of this energy. The light the our eyes have the right to see is actually component of the electromagnetic spectrum.

You are watching: Which of the following is a type of wave that does not need a medium though which to travel?

This visible part of the electromagnetic spectrum is composed of the colors that we view in a rainbow - indigenous reds and oranges, with blues and purples. Every of this colors actually coincides to a various wavelength of light.


*
Electromagnetic waves

The sound we hear is a result of waves which us cannot see. Sound waves need something to travel v in order because that it to relocate from one place to the next. Sound have the right to travel with air due to the fact that air is made of molecules.

These molecules carry the sound tide by bumping right into each other, like dominoes knocking each various other over. Sound have the right to travel with anything made of molecules - even water! there is no sound in an are because there room no molecules there to transmit the sound waves.


Electromagnetic spectrum

Electromagnetic waves are not choose sound waves since they carry out not require molecules to travel. This way that electromagnetic waves have the right to travel with air, solid objects and also even space. This is how astronauts ~ above spacewalks usage radios to communicate. Radio waves space a kind of electromagnetic wave.


Electromagnetic spectrum

Electricity deserve to be static, prefer what hold a balloon come the wall surface or makes your hair was standing on end. Magnetism can likewise be static choose a refrigerator magnet. But when they change or move together, they make waves - electromagnetic waves.

Electromagnetic tide are developed when an electric field (which is displayed in red arrows) couples v a magnetic field (which is presented in blue arrows). Magnetic and also electric areas of an electromagnetic wave space perpendicular to each other and also to the direction that the wave.

When you hear to the radio, clock TV, or chef dinner in a microwave oven, you space using electromagnetic waves. Radio waves, tv waves, and microwaves space all species of electromagnetic waves. They just differ from each other in wavelength. Wavelength is the distance in between one tide crest come the next.

Waves in the electromagnetic spectrum differ in size from really long radio tide the size of buildings, to an extremely short gamma-rays smaller sized than the size of the nucleus of one atom. Yet their size can be regarded their energy.

The smaller sized the wavelength the greater the energy. Because that example, a brick wall blocks clearly shows light tide lengths. Smaller, an ext energetic, x-rays deserve to pass v brick walls, but themselves space blocked through denser product such as lead.

While it can be said waves are "blocked" by details materials, the correct knowledge is that wave lengths of energy are "absorbed" by objects, or not. That is, wave length energy can be took in by specific material.

See more: Br A Fly Has Two Alleles For The Color Of Its Eyes, Newpoint Biology Unit 3 Test Review Flashcards

We use this understanding in benidormclubdeportivo.org satellites as the atmosphere likewise absorbs some wave lengths while enabling others to happen through.