1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
White raven [17]
3 years ago
5

21.13 The index of refraction of corundum (Al2O3) is anisotropic. Suppose that visible light is passing from one grain to anothe

r of different crystal-lographic orientation and at normal incidence to the grain boundary. Calculate the reflectivity at the boundary if the indices of refraction for the two grains are 1.757 and 1.779 in the direction of light propagation.
Engineering
1 answer:
d1i1m1o1n [39]3 years ago
6 0

Answer:

3.87 x 10⁻⁵

Explanation:

Given parameters

normal incidence

refraction index of grain1, n₁ = 1.757

refraction index of grain2, n₂ = 1.779

to calculate reflectivity index between the two grains of different orientation an at normal incidence, we use the relation

R = [\frac{n2 - n1}{n2 + n1} ]^{2}

since the incidence is normal where R, is the index of relativity

R = [\frac{1.779 - 1.757}{1.779 + 1.757} ]^{2}

R = 3.87 x 10⁻⁵

You might be interested in
Consider two Carnot heat engines operating in series. The first engine receives heat from the reservoir at 1400 K and rejects th
Aleksandr-060686 [28]

Answer:

The temperature T= 648.07k

Explanation:

T1=input temperature of the first heat engine =1400k

T=output temperature of the first heat engine and input temperature of the second heat engine= unknown

T3=output temperature of the second heat engine=300k

but carnot efficiency of heat engine =1 - \frac{Tl}{Th} \\

where Th =temperature at which the heat enters the engine

Tl is the  temperature of the environment

since both engines have the same thermal capacities <em>n_{th} </em> therefore n_{th} =n_{th1} =n_{th2}\\n_{th }=1-\frac{T1}{T}=1-\frac{T}{T3}\\ \\= 1-\frac{1400}{T}=1-\frac{T}{300}\\

We have now that

\frac{-1400}{T}+\frac{T}{300}=0\\

multiplying through by T

-1400 + \frac{T^{2} }{300}=0\\

multiplying through by 300

-420000+ T^{2} =0\\T^2 =420000\\\sqrt{T2}=\sqrt{420000}  \\T=648.07k

The temperature T= 648.07k

5 0
3 years ago
It is desired to produce and aligned carbon fiber-epoxy matrix composite having a longitudinal tensile strength of 800 MPa. Calc
Aloiza [94]

Answer:

A certain vehicle loses 3.5% of its value each year. If the vehicle has an initial value of $11,168, construct a model that represents the value of the vehicle after a certain number of years. Use your model to compute the value of the vehicle at the end of 6 years.

Explanation:

5 0
3 years ago
Who here is a genius?
Pachacha [2.7K]

Answer:

im kinda smart  whyy?

Explanation:

3 0
3 years ago
Read 2 more answers
Horizontal shear forces and, consequently, horizontal shear stresses are caused in a flexural member at those locations where th
jek_recluse [69]

Answer:

False

Explanation:

When the horizontal shear forces act on the surface there is transverse shear stress at a particular point which is equal in magnitude. Pure bending is less common than a non uniform bending because the beam is not in equilibrium.

5 0
3 years ago
Select the correct answer. which process involves creating a product by heating metals and changing their shape through the appl
Paraphin [41]

Answer:

I would say that it is forming.

Explanation:

Give brainliest if u can. :S

4 0
2 years ago
Other questions:
  • 5. A typical paper clip weighs 0.59 g and consists of BCC iron. Calculate (a) the number of
    5·1 answer
  • EMB agar is a medium used in the identification and isolation of pathogenic bacteria. It contains digested meat proteins as a so
    10·1 answer
  • In order to build a skyscraper Builders, Inc. hires 400 construction workers and 50 managers. Builders, Inc. represents A entrep
    8·1 answer
  • Amplifiers are extensively used in the baseband portion of a radio receiver system to condition the baseband signal to produce a
    5·1 answer
  • . A piston-cylinder device whose piston is resting on top of a set of stops initially contains 0.5 kg of helium gas at 100 kPa a
    14·1 answer
  • State the mathematical expression to define the availability of equipment over a specified time and operational availability?
    6·1 answer
  • A Wii remote flung from a hand through a TV, with a kinetic energy of 1.44J and a mass of 4.5kg. Whats the velocity?
    6·1 answer
  • A new approval process is being adapted by Ursa Major Solar. After an opportunity has been approved, the contract is sent to the
    9·1 answer
  • in the multiple pipe system shown below, which of the following is true concerning the linear system?.
    14·1 answer
  • The first thing you should do is develop a ____________________ to determine what vehicle you can afford.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!