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The intensity of a beam can be measured by the power contained in a square metre cross-section of the beam. For example the Sun's light has an intensity of about 1400 watts per square metre.

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What are spectrographs?

Spectrographs are instruments that separate EM radiation (primarily light) into a spectrum of frequencies and record the data. The intensity of radiation at the different frequencies can be used to ascertain information about the source of the radiation or the material through which it is passing.


What does electromagnetic have to do with EM radiation?

EM is short for electromagnetic.


At what speed does all EM radiation travel at?

In a vacuum, 3x10^8 ms^-1. Basically the speed of light, it is EM radiation afterall.


What type of em radiation do conventional ovens use?

infrared radiation ;)<3


What type of em radiation has shortest wavelength and most energy?

Gamma radiation


What is the scientific term for light?

"electro-magnetic radiation" "electro magnetic radiation" em radiation


What distance does electromagnetic radiation travel in 10.7?

In 10.7 femtoseconds, em radiation will travel 3.208 E -6 meters. EM radiation travels at the speed of light, or 299, 792, 458 m/s.


From Where does the energy carried by an EM wave come?

The electromagnetic (EM) spectrum is a name for different types of radiation. Most radiation comes from the sun. Want more info?


What EM radiation that can be seen with the naked eye?

Visible light


What type of wave is EM radiation?

EM radiation is short for electromagnetic radiation. It is a wave in the electric and magnetic fields.EM radiation is short for electromagnetic radiation. It is a wave in the electric and magnetic fields.EM radiation is short for electromagnetic radiation. It is a wave in the electric and magnetic fields.EM radiation is short for electromagnetic radiation. It is a wave in the electric and magnetic fields.


What type of em wave raditiation is a type of heat wave?

Heat radiation is mainly associated with infrared radiation.


Why is it true to say that all EM radiation is light even though we can see only a small slice of the spectrum as visible light?

Visible light is a very small part of the EM spectrum and it is intellectual laziness to refer to all EM radiation as light.