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AleksAgata [21]
3 years ago
6

We wish to coat flat glass (n = 1.50) with a transparent material (n = 1.20) so that reflection of light at wavelength 529 nm is

eliminated by interference. what minimum thickness can the coating have to do this?
Physics
1 answer:
hjlf3 years ago
8 0
For full destruction of the wavelength,
2t = y/2

t = thickness of the coating material
y = wavelength in the coating material

But;
y = y_a/n; where y_a is wavelength in air

Substituting;
y = 529/1.2 = 440.83 nm

Then,
t = y/4 = 440.83.4 = 110.21 nm

Therefore, thickness of the coating material should be 110.21 nm.
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1.7 kJ = (5487.24)In(v₂/19)

1700 = (5487.24)In(v₂/19)

In(v₂/19) = (1700/5487.24) = 0.3098

In(v₂/19) = 0.3098

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A car is traveling at a velocity of 22 m/s when the driver puts on the brakes
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The car’s velocity at the end of this distance is <em>18.17 m/s.</em>

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To find the car’s velocity at the end of this distance, we would use the third equation of motion;

Mathematically, the third equation of motion is calculated by using the formula;

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Substituting the values into the formula, we have;

V^2 = 22 + 2(1.4)(110)\\\\V^2 = 22 + 308\\\\V^2 = 330\\\\V^2 = \sqrt{330}

<em>Final velocity, V = 18.17 m/s</em>

Therefore, the car’s velocity at the end of this distance is <em>18.17 m/s.</em>

<em></em>

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