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
myrzilka [38]
2 years ago
7

Think about the way optical fibers are designed. why are the ends of the fibers glowing very brightly while the sides of the fib

ers are not?
A. because the light only strikes the ends of the fibers, not the sides
B. because the fibers’ sides absorb any light that strikes it
C. because the ends of the fibers convert the signal into visible light
D. because the light is reflected back into the fiber along its sides
PLEASE HELP ITS MY LAST QUESTION!!
Physics
1 answer:
Effectus [21]2 years ago
6 0

Answer:

D. because the light is reflected back into the fiber along its sides

Explanation:

The fiber is constructed in a way that the light is bent/reflected/refracted toward the center core of glass. So, from the center core, there is a layer above it that has a different propagation than the core, and above that the same thing. To give you a real world visual example, if you look down in a pool of water, then stick a straight stick into it, you see that the straight stick appears to bend. That is what is happening to the light as it travels through a different medium (air to water). This same effect is incorporated in the fiber optic cable construction.

You might be interested in
Eating pizza with friends after a football game is most likey an example of which food choice factors?
77julia77 [94]

Answer:

time and cost

Explanation:they have to pay for the pizza and take time to eat it

7 0
3 years ago
Read 2 more answers
An excited atom decays to its ground state and emits a photon of green light. If instead the atom decays to an intermediate stat
scoundrel [369]

Answer:

the light emitting must be of greater wavelength

Explanation:

For this exercise we must use the Planck equation

             E = h f

And the speed of light

            c = λ f

            f = c / λ

We replace

            E = h c / λ

The wavelength of the green light is of the order of 500 nm, let's calculate the energy

          E = 6.63 10⁻³⁴  3 10⁸ /λ

          E = 1,989 10⁻²⁵ /λ

          λ = 500 nm = 500 10⁻⁹ m

          E = 1,989 10⁻²⁵ / 500 10⁻⁹

          E = 3,978 10⁻¹⁹ J

That is the energy of the transition for a transition is an intermediate state the energy must be less, this implies that the wavelength must increase. For the explicit case of a state with half of this energy

            E_{int} = E / 2

             E_{int} = 3,978 10⁻¹⁹ / 2 = 1,989 10⁻¹⁹

Let's clear and calculate

           λ = h c / E

           λ = 1,989 10⁻²⁵ / 1,989 10⁻¹⁹

           λ = 1 10⁻⁶ m

Let's reduce to nm

          λ = 1000 nm

This wavelength is in the infrared region

the light emitting must be of greater wavelength

8 0
3 years ago
A 31 kg crate full of very cute kittens is placed on an incline that is 17° below the horizontal. The crate is connected to a sp
fgiga [73]

Answer:

Explanation:

Change in length of spring = 2.13 m

Component of weight acting on spring = mg sinθ

so

mg sinθ = k x where k is spring constant and x is total stretch due to force on the spring.

Here x = 2.13

mg sin17 = k x 2.13

31 x 9.8 sin17 = k x 2.13

k = 41.7 N/m

b ) In case surface had friction , spring would have stretched by less distance .

It is so because , the work done by gravity in stretching down is stored as potential energy in  spring . In case of dissipative force like friction , it also takes up some energy in the form of heat etc  so spring stretches less.

5 0
3 years ago
The circuit has a 3 volt EMF and two ohm resistors. How much power in watts does this circuit draw? A) 4.5 , B) 24, C) 1.13 D) 2
dlinn [17]

Answer:

P = 4.5 watts

Explanation:

Given that,

EMF of the circuit, E = 3 volt

The resistance  of the resistors, R = 2 ohms

We need to find the power of this circuit. The relation between power, emf and resistance is given by the formula as follows :

P=\dfrac{V^2}{R}

Substitute all the values,

P=\dfrac{3^2}{2}\\\\P=4.5\ W

So, the power of this circuit is equal to 4.5 watts.

5 0
3 years ago
An object that covers more distance in the same amount of time has a higher speed.
DiKsa [7]

Answer:

true

Explanation:

5 0
2 years ago
Read 2 more answers
Other questions:
  • A car is traveling in a race.The car went from initial velocity of 35m/s to the final velocity of 65m/s in 5 seconds what was th
    9·2 answers
  • 20pts! What are the thin fibers of the human nervous system called?
    7·2 answers
  • What is a superpositional principle
    7·2 answers
  • What's the hikers average velocity during part D of the hike?
    7·1 answer
  • answers If visible light and radio waves are both examples of electromagnetic waves, why can’t we see radio waves?
    9·1 answer
  • The work function of a material is the minimum energy required to remove an electron. Given the work function of gold is 4.90 eV
    12·1 answer
  • A kicked ball rolls across the grass and eventually comes to a stop in 4.0 sec. When the ball was kicked, its initial velocity w
    10·1 answer
  • How to find the mechanical advantage
    10·2 answers
  • The Ancient Roman economy did not make use of
    8·2 answers
  • a piston-cylinder apparatus has a 4 kg piston with a diameter of 5 cm resting on a body of water 60 cm high. atmospheric pressur
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!