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olya-2409 [2.1K]

3 years ago

9

Refraction occurs when light passing from one medium to another. True or False

1 answer:

kodGreya [7K]3 years ago

7 0

Answer: True

Refraction is a phenomenon in which the light bends or changes its direction (and changes the speed of propagation, as well) <u>when passing through a medium</u> with a refractive index $n$ <u>different from the other medium. </u>

Where the Refractive index is a number that describes how fast light propagates through a medium or material:

$n=\frac{c}{v}$

Being $n$ a relation between the speed of light in vacuum $c$ and its speed in the other medium $v$ .

It is important to note that in this process, the wavelength may be modified because it depends on the medium, however, the refracted ray of light does not change its frequency.

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Answer:

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The direction is $- \r k$ i.e the negative direction of the z-axis

Explanation:

From the question we are that

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The the magnetic field is $\= B = (1.63T)\r i + (0.980T) \r j$

The charge experienced a force which is mathematically represented as

$F = q (\= v * \= B)$

Substituting value

$F = 1.22*10^{-8} (( 3*10^4 ) \r j \ \ X \ \ ( 1.63 \r i + 0.980 \r j )T)$

$= 1.22 *10^{-8} ((3*10^4 * 1.63)(\r j \ \ X \ \ \r i) + (3*10^4 * 0.980) (\r j \ \ X \ \ \r j))$

$= (-5.966*10^4 N) \r k$

Note :

$i \ \ X \ \ j = k \\\\j \ \ X \ \ k = i\\\\k \ \ X \ \ i = j\\\\j \ \ X \ \ i = -k \\\\k \ \ X \ \ j = -i\\\\i \ \ X \ \ k = - j\\$

Now force is also mathematically represented as

$F = ma$

Making a the subject

$a = \frac{F}{m}$

Substituting values

$a =\frac{(-5.966*10^4) \r k}{1.81*10^{-3}}$

$= (-0.33m/s^2)\r k$

$= 0.33m/s^2 * (- \r k)$

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(12^2 + 4^2)^1/2 = 12.6 (3 sig. fig.)

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