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2 years ago

13

HELP ME PLZ ASAP!!

2 answers:

MAXImum [283]2 years ago

6 0

Answer:

I do not know if this is correct, but I think it is a meteor

Explanation:

Schach [20]2 years ago

5 0

Satellites are those small body, while it is still out in space, NOT while it burns up in Earth’s atmosphere.

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Which ocean zone receives the most amount of sunlight?

Marrrta [24]

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2 years ago

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Which of the following is an example of Genetic Engineering?

crimeas [40]

Answer is B in my opinion

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2 years ago

The fluid mosaic model describes the plasma membrane as consisting of

Hoochie [10]

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1 year ago

Tire manufacturers design tires to stop quickly in various conditions. Use the table to answer the question.

Arada [10]

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2 years ago

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An owl has good night vision because its eyes can detect a light intensity as small as 5.0 × 10-13 W/m2. What is the minimum num

Lady bird [3.3K]

Answer:

Thus, the minimum number of photons per second is 77.34

Explanation:

Light intensity, $I_{min}$ = $5\times 10^{-13} W/m^{2}$

Pupil has a diameter, d = 8.5 mm

= 8.5 x $10^{-3}$ m

Radius of the eye, r = 4.25 x $10^{-3}$ m

∴ Area of the eye, A = $\pi .r^{2}$

= $3.14\times \left ( 4.25\times 10^{-3} \right )^{2}$

= $5.6\times 10^{-5} m^{2}$

Let $P_{min}$ be the minimum number of photons.

Therefore, $P_{min}$ = $I_{min}$ x A

= $5\times 10^{-13}$ x $5.6\times 10^{-5}$

= $2.8\times 10^{-17}$ W

Thus the minimum number of photons is given by

$N_{min}=P_{min}/E$

where E = $hc/\lambda$

= $\left (6.63\times 10^{-34}\times 3\times 10^{8} \right )/548\times 10^{-9}$

= $3.62\times 10^{-19} J$

Therefore, $N_{min}$ = $\frac{2.8\times 10^{-17}}{3.62\times 10^{-19}}$

= 77.34 photons per second

Thus, the minimum number of photons per second is 77.34

4 0

3 years ago