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vampirchik [111]
3 years ago
7

The law of reflection states that if the angle of incidence is 76 degrees, the angle of reflection is ___ degrees.

Physics
1 answer:
Ann [662]3 years ago
3 0
Answer is 76 degrees. 

The law of reflection states that when a line is reflected on a straight plane, the angle of incidence is equal to the angle of reflection. In this case, the angle of incidence and the angle reflection are 76 degrees.
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A) 1.55

The speed of light in a medium is given by:

v=\frac{c}{n}

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c=3\cdot 10^8 m/s is the speed of light in a vacuum

n is the refractive index of the material

In this problem, the speed of light in quartz is

v=1.94\cdot 10^8 m/s

So we can re-arrange the previous formula to find n, the index of refraction of quartz:

n=\frac{c}{v}=\frac{3\cdot 10^8 m/s}{1.94\cdot 10^8 m/s}=1.55

B) 550.3 nm

The relationship between the wavelength of the light in air and in quartz is

\lambda=\frac{\lambda_0}{n}

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For the light in this problem, we have

\lambda=355 nm\\n=1.55

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