Math, asked by Dhrua, 1 year ago

Define meter in terms of wave length of light.

ICSE Class 9 Physics Chapter Measurements and Experimentation

Answers

Answered by shashankgoswami
2
 The metre is defined as the length of the path travelled by light in a vacuum in 1299 792 458 second
Answered by Anonymous
2
The meter was defined as 1,650,763.73 times the wavelength of a specified orange-red spectral line in the emission spectrum of Krypton-86.
                                                or
One meter is 1,553,164.1 times the wavelength of the red line in the emission spectrum of cadmium.
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