How many km/s does light travel?
Light travels at about 300,000 km/s. How many minutes does it take an electromagnetic wave to travel from the sun to the earth, which is about 150,000,000 km away?
What are electromagnetic waves?
All are electromagnetic waves; radio waves are very long & are used for communications; Infrared waves are long and are used for thermal imaging; Ultraviolet waves are short and are used for purification & forensic. A mug of tea is heated in a microwave oven. Explain why the tea gets hotter than the mug.
What happens to the signal when distance decreases?
The signal decreases with distance and the signal becomes too weak.
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