關於電磁波(物理題)

1.What is the range of wavelength for visible light?

About 380 nm (violet light) to 760 nm(red light)

2.What is the shortest wavelength for visible light?What colour is it?

About 380 nm, it is violet light.

3.What is the longest wavelength for visible light?What colour is it?

About 760 nm, it is red coloured light.

4.Which family of EM waves has longest wavelength?

Long radio waves, with wavelengths longer than 1 km (1000 m).

5.Which family of EM waves has shortest wavelength?

High energy cosmic gamma rays. There is no defined limit for their wavelengths, as this is still unknown to human knowlwdge. HIgh energy cosmic gamma rays discovered so far have wavelengths shorter than 0.01 nm