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3 years ago

14

Visible light travels at a speed 3.0 × 108 of m/s. If red light has a wavelength of 6.5 × 10–7 m, what the frequency of this lig

ht?

1 answer:

laila [671]3 years ago

4 0

Answer:

speed /wavelength = frequency

f = 3×10*8 /6.5×10*7

f = 4.62

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Answer:

Part A B. Part B C.

Explanation:

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if u = +2/3 e and d= -1/3 e, we need a combination which sum gives +3/3 e.

Combination A adds to 6/3e, so it is not possible. C adds to zero, and D gives a negative result.

The only remaining choice is udd:

uud ⇒ +2/3 e + 2/3 e -1/3 e = +3/3 e = +e

So, the statement B is true.

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So, A and D are not possible, as they are combinations of the same type of quarks, so the sum is either positive or negative, but not zero.

uud gives +e (we chose it to make a proton in part A), so the only remaining choice is udd:

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D. All of the above

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Answer:

r = 2.55 m

Explanation:

Given that,

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A light beam is traveling through an unknown substance. When it exits that substance and enters into air, the angle of reflectio

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Answer:

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