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how to measure speed of light. 299792458 meters per second 186282 miles per seconda speed. To measure the speed of light would require an external definition of what a meter is and since about the 1970s we dont have one.
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Its exact value is defined as 299 792 458 metres per second approximately 300 000 kms or 186 000 mis. The speed of light in vacuum commonly denoted c is a universal physical constant important in many areas of physics. This may not be something youd thought of doing but now you know how the speed of light can be measured using only some marshmallows and a microwave ovenWa.
C 299792458 m s.
With one more piece of information the frequency of the waves you will be able to calculate the speed of light. You should be able to find the frequency of the microwaves on a label on the back of the oven. C 299792458 m s. To measure the speed of light would require an external definition of what a meter is and since about the 1970s we dont have one.
