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zlopas [31]
3 years ago
7

Light is an electromagnetic wave and travels at a speed of 3.00 × 108 m/s. The human eye is most sensitive to yellow-green light

, which has a wavelength of 5.04 × 10-7 m. What is the frequency of this light?
Physics
1 answer:
Nimfa-mama [501]3 years ago
6 0

Answer:

f = 5.95 \times 10^{14} Hz

Explanation:

As we know that the frequency of the wave is given as

f = \frac{c}{\lambda}

here we know that

c = 3 \times 10^8 m/s

also we know that

\lambda = 5.04 \times 10^{-7} m

now we have

f = \frac{3 \times 10^8}{5.04 \times 10^{-7}}

f = 5.95 \times 10^{14} Hz

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rusak2 [61]

Answer:

359 m/s

Explanation:

Highest frequency a person can hear is 20,000Hz.

f = c × λ

Frequency = Wave speed × Wavelength

Wavelength = 20,000 ÷ 343 = 58.31m

Wavespeed = Frequency ÷ Wavelength

c = 20,950 ÷ 58.31 = 359.3 m/s

= 359 m/s (3 s.f.)

3 0
3 years ago
The unit of electrical current is the ampere (A).
IrinaVladis [17]

Answer:

option B

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Current unit is ampere (A)

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we know,

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unit of time(t) is equal to 's'.

now,

I = \dfrac{C}{s}

unit of I = C/s

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The correct answer is option B

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3 0
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