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joja [24]
3 years ago
10

What is the minimum coating thickness (but not zero) that will minimize the reflection at the wavelength of 705 nm where solar c

ells are most efficient?
Physics
1 answer:
DanielleElmas [232]3 years ago
4 0

Answer:

d = 235 nm.

Explanation:

Let the layer be of glass. Refractive index of glass μ = 1.5. Let the required  thickness be d.

For minimum reflection , that is destructive interference in thin films , the condition is

2μd = λ ( for first order)

d = 705 / 2 x 1.5 = 235 nm [ λ =705 nm ]

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lord [1]
Momentum, p = m.v
m of the girl = 60.0 kg
m of the boat = 180 kg
v of the girl = 4.0 m/s

A) Momentum of the girl as she is diving:
p = m.v = 60.0 kg * 4.0 m/s = 24.0 N/s

B) momentum of the raft = - momentum of the girl = -24.0 N/s

C) speed of the raft

p = m.v ; v = p/m = 24.0N/s / 180 kg = -0.13 m/s [i.e. in the opposite direction of the girl's velocity]
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Black_prince [1.1K]

Answer:

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3 years ago
A 1kg mass is thrown to a height of 2cm. what is the potential energy​
prohojiy [21]
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\\ \tt\hookrightarrow P.E=mgh

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ololo11 [35]

Answer:

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