3 years ago

HEY CAN ANYONE ANSA DIS!!!

Physics

1 answer:

Marizza181 [45]3 years ago

8 0

Answer:

C. 5.35 × 10^-5

Explanation:

5.35 × 0.00001 = 0.0000535

Hope this helped!

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Answer:

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Explanation:

We are given that

Power,Ptot=960mW= $960\times 10^{-3}W$

$1mW=10^{-3} W$

Wavelength, $\lambda=360 nm=360\times 10^{-9} m$

$1nm=10^{-9} m$

Distance,r=2.5 cm= $2.5\times 10^{-2} m$

1m=100 cm

Efficiency=55%

Power radiation emitted= $\frac{55}{100}\times 960\times 10^{-3}=0.528W$

Intensity,I= $\frac{P}{4\pi r^2}$

$I=\frac{0.528}{4\pi(2.5\times 10^{-2})^2}=67.26W/m^2$

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$E^2_0=\frac{2I}{c\epsilon_0}$

Where $\epsilon_0=8.85\times 10^{-12}$

$c=3\times 10^8 m/s$

$E_0=\sqrt{\frac{2I}{c\epsilon_0}}$

$E_0=\sqrt{\frac{2\times 67.26}{3\times 10^8\times 8.85\times 10^{-12}}}$

$E_0=225.09N/C$

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Answer:

45 meters

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20 min = 15 meters

So if 20 x 3 = 60

you have to do 3 x 15 !

- which equals to 45 <3

<u>- mark me brainlest pls . </u>

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