Physics, asked by ramatulasitulasi3173, 8 months ago

7A. How fast a person should drive his car so
the red signal of light appears green?
(Wavelength for red colour - 6200 Å
wavelength for greeen colour - 5400 Å)
1) 1.5x108 m/s 2) 7x10?m/s
3) 3.9x10’m/s 4) 2x108 m/s
star is moving towards the earth u

Answers

Answered by pjsigh

4

Answer:

Explanation:

Answered by nagarajutelugu72

0

Answer:

3 rd option is correct IE 3.9 X 10'7

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