What do sensors measure from space?

What do sensors measure from space?

What do sensors measure from space? Sensors measure the amount of light being reflected or emitted from the Earth's surface in different parts of the Electromagnetic Spectrum . Sensors may detect visible light, the wavelengths we can see with the human eye, but they can also detect much longer radio waves, microwaves and infrared radiation. Measuring the energy reflected or emitted in these different wavelengths on the Electromagnetic Spectrum can reveal additional information about the earth. The wavelength of a wave is the distance between a point on one wave and the same point on the next wave Long wavelength Short wavelength