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Answer:
- Light is defined as the electromagnetic radiation with wavelengths between 380 and 750 nm which is visible to the human eye
- Some of the light energy examples are light from stars, fire, sun, glowing coils, electric bulb, flashlights, lasers and light from kerosene lamps.
- The primary properties of light are intensity, propagation direction, frequency or wavelength spectrum and polarization. Its speed in a vacuum, 299 792 458 metres a second (m/s), is one of the fundamental constants of nature
- These are the forms of nonvisible light—those that we cannot see: radio waves, microwaves, infrared radiation, ultraviolet light, X-rays, and gamma rays.