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
Oksana_A [137]
3 years ago
10

A laser beam is incident on a plate of glass that is 2.8 cm thick. The glass has an index of refraction of 1.6 and the angle of

incidence is 36°. The top and bottom surfaces of the glass are parallel. What is the distance b between the beam formed by reflection off the top surface of the glass and the beam reflected off the bottom surface of the glass?
Physics
1 answer:
Anna11 [10]3 years ago
8 0

Answer:

 b = 2.22 cm

Explanation:

The laser hits a point where the origin of the coordinate system is to carry out the measurements. When the ray enters the glass the angle of refraction is given by the equation

       n₁ sin θ₁ = n₂ sin θ₂

where n₁ is the index of refraction of air n₁ = 1 and n₂ is the index of refraction of glass n₂ = 1.6

       sin θ₂ = n₁ /n₂ sin θ₁

     

       sin θ₂ = 1 / 1.6 sin 36

       sin θ₂ = 0.367

        θ₂ = sin⁻¹ 0.367

        θ₂ = 21.6º

 with this angle and trigonometry we can find the distance x that the ray advances before reaching the bottom of the glass plate

        tan 21.6 = x / d

where d is the thickness of the glass d = 2.8 cm

         x = d tan 21.6

         x = 2.8 tan 21.6

         x = 1.11 cm

 as in the second surface it has a process of reflection the angle of reflection is equal to the angle of incidence θ_reflected = 21.6º, therefore to return to the upper surface recreate the same distance, therefore the total distance is

           b = 2x

           b = 2 1.11

           b = 2.22 cm

You might be interested in
If the earth shrank until its radius were only one-quarter its present size without changing its mass what would a 20 n object w
Dahasolnce [82]

Basing on the information given, we can calculate the new weight of the object by the following given:current weight = 20 Ng = 10m/s2

20N/4 = 5N

Thank you for your question. Please don't hesitate to ask in Brainly your queries. 
5 0
3 years ago
Enter a curve slower than the posted speed if your vehicle has a high center of gravity or if surface _____________ is less than
alisha [4.7K]

Answer:

Traction

Explanation:

Enter a curve slower than the posted speed if your vehicle has a high center of gravity or if surface Traction is less than ideal.

Traction is an act of drawing or pulling something over a surface specially a road or a track or it also defined as the grip of a tire on road or a wheel on rail. So speed when entering a curve should be slower when the tire has low traction to avoid accident.

5 0
3 years ago
Which of the following statements is TRUE?
Marrrta [24]

Answer:

I think C......................

5 0
3 years ago
How can you use the density of an object to predict whether it will sink or float?
Bas_tet [7]

Answer:

Explanation:

If an object has a higher density than the fluid it is in (fluid can mean liquid or gas), it will sink. If it has a lower density, it will float. Density is determined by an object's mass and volume. If two objects take up the same volume, but have one has more mass, then it also has a higher density.

7 0
3 years ago
Read 2 more answers
If a runner has a speed of 8.66m/s and runs for 46.2s what distance is covered? tv = d
kati45 [8]

Answer:

\text{Using the formula: }v=\frac{d}{t}\\\therefore vt=d\\\text{Plug and chug:}46.2(8.66)=400.092\text{ metres}

6 0
3 years ago
Other questions:
  • The _____ of an object is a measure of the distance an object moves in a given amount of time. *
    10·1 answer
  • How do you verify scientific hypothesis?
    8·1 answer
  • The magnetic flux that passes through one turn of a 18-turn coil of wire changes to 2.67 from 8.19 Wb in a time of 0.0386 s. The
    7·1 answer
  • If a child starts from rest at point A and lands in the water at point B, a horizontal distance L = 2.52 m from the base of the
    13·1 answer
  • Explain the force responsible for the formation of our solar system.
    6·1 answer
  • Suppose that at point A the object traveled in a straight line at constant speed towards B'. In what direction must a force be a
    11·1 answer
  • B. A bird in air looks a fish vertically below it inside the water from a distance 5m from surface of water and fish lies at dep
    10·1 answer
  • If a car has a velocity of 85 km/hr, how long will it take to accelerate to 45 km/hr if the acceleration is -3 km/hr/sec?
    10·1 answer
  • If a rock weighing 3.5 newtons is resting on cliff's ledge 12 meters from the canyon floor, what is its potential energy?
    14·1 answer
  • the mass of an object is 90 kg calculate weight of the same object on the surface of the moon.(acceleration due to gravity on th
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!