All of the following statements about electromagnetic radiation are true except:

1) All electromagnetic radiation travels at the speed of light.
2) All electromagnetic radiation can be considered a form of light.
3) All electromagnetic radiation can be seen.
4) All electromagnetic radiation travels in waves.

Respuesta :

skyp
The one that is false in this case is 3) All EMR can be seen. We cannot see EMR that is below visible light with the naked eye.

However with this question, one thing that I would like to point out is that EMR only travels at the speed of light when it is in a vacuum a.k.a. air. Otherwise it doesn't travel at the speed of light because it could be refracted.

All the options are true for electromagnetic radiation except option (3).

Further explain:

Here, we will see the explanation of each given option.

So,  options are explained  as.

1. All the electromagnetic radiation travels at the speed of light.

The light wave composed of electric field as well as magnetic field and these fields are perpendicular to each other.

Due to presence of electric field as well as magnetic field in light wave it is known as electromagnetic wave.

So, light is also an electromagnetic radiation.

2. All electromagnetic radiation can be considered as the light.

Yes, all the electromagnetic radiation can be considered as the light, because all the electromagnetic radiation have same property as light but only difference in their frequency and wavelength.

3. All electromagnetic radiation can be seen.

No, all the electromagnetic radiation cannot be seen but some range of electromagnetic radiation can be seen which is known as visible range.

The electromagnetic radiation between this range is generally known as light.

4. All electromagnetic radiation travel in wave.

All the electromagnetic radiation travel is wave form and this wave form is transverse wave.

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Answer detail:

Grade: High School

Subject: Physics

Chapter: Wave

Keywords:

Electromagnetic wave, radiation, wave, light wave, speed of light, naked eye, electric field, magnetic field, perpendicular, oscillate, visible range, frequency, wavelength, energy, matter wave.