Define Electromagnetic Spectrum

these waves heat the food we eat and have shorter wavelengths than radio waves; also used for radar images likethe Doppler
radar used in weather forecasts

Electromagnetic waves with the shortest wavelengths and highest frequencies: generated by radioactive atoms in
nuclearexplosions. Some doctors use these waves to kill cancer cells.

the arrangement of the different kinds of electromagnetic radiation according to their wavelengths and frequencies

Wave bends around a obstacle or slit