1. Radiation is energy emitted in waves or particles.

2. Radiation in the EM Spectrum: Lowest to Highest

Radio, Microwaves, Inferred, Visible, Ultraviolet, X-rays, Gamma Rays

3. Ultraviolet, Radio, X-rays and Gamma rays are emitted by stars.

4. Both microwaves and gamma rays are a form of electromagnetic radiation. The diffrerence is in the range of wavelengths that they fall in.

5. Visible Spectrums, radio frequencies and some ultraviolet wavelengths can reach the Earth from space. Electromagnetic Radiation cannot reach us from space. This can be due to the lack of wavelength.

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