3 years ago

Apakah benar listrik statis tidak berbahaya karena tegangannya rendah

Physics

1 answer:

elena-14-01-66 [18.8K]3 years ago

7 0

Maka sukuû tapa tuulula chupa miôpas

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A ray moving in plastic at 62.9 deg enters water, where it bends to 70.9 deg. What is the index of refraction of the plastic?

DedPeter [7]

Answer:

refractive index of plastic is 1.42

Explanation:

When light ray enters from one medium to other medium then due to transition of light it bends away or towards the normal, this phenomenon is known as refraction of light

So here we know that

$n_1 sin i = n_2 sin r$

here we have

$n_2 = \frac{4}{3}$

$i = 62.9^o$

$r = 70.9^o$

now we have

$n_1 sin62.9 = (\frac{4}{3}) sin70.9$

$n_1 = 1.42$

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Alex

Hello there,
400 meters= 0.4 km
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= 0.4 / 69
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Hope this helps :))

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