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
Angelina_Jolie [31]
3 years ago
6

An LED operation at 850 nm center wavelength has a spectral width of 45 nm. What is the pulse spreading in ns/km

Physics
1 answer:
Papessa [141]3 years ago
3 0

Answer:

\mathbf{\dfrac{\sigma_{mat}}{L} = 3.6 \ ns/ km}

Explanation:

From the given information, the LED is operating with a given wavelength of 850 nm or 0.85 μm.

Hence, the material dispersion is \dfrac {d \tau _{mat}}{d \lambda } \simeq (80 \ ps / (nm.km) \ )

Now, using the pulse spread formula:

\dfrac{\sigma_{mat}}{L} = \dfrac{d \tau _{mat} }{d \lambda} \sigma \lambda

\dfrac{\sigma_{mat}}{L} = (80 \ ps/ ( m.km) \ )  \times (45 \ nm)

Thus, the pulse spreading as a result of  material dispersion is:\mathbf{\dfrac{\sigma_{mat}}{L} = 3.6 \ ns/ km}

You might be interested in
The force that pulls planets torwards the sun is called​
Studentka2010 [4]

Answer:

gravity

Explanation:

Gravity pulls the planets toward the Sun. Gravity pulls the moon toward Earth. Gravity pulls us toward the Earth. Gravity is a force. Inertia.

7 0
3 years ago
Hi guys! :) I really need help on this!! Will def mark brainliest
Travka [436]

Wavelength = (speed) / (frequency)

Speed of radio = speed of light.

3 0
3 years ago
What is 7.325 NS x 10 to the 549 power GS equal?
Alexxandr [17]
Idrk sorry ___\........../.....
5 0
3 years ago
Which characteristic should a good scientific question have?
RUDIKE [14]
A good scientific question should be pre-determined and also have a meaning or relation to science. 


7 0
3 years ago
Read 2 more answers
Explain how you can recognize the sound of a flute
lions [1.4K]

Answer:

It's airy, light, poetic, mellow, bright, wafting, ethereal, rich, soft, graceful, penetrating, brilliant, clear, shrill, silvery, wind-like, whistling, whispering, humming, filigree, sighing, aspirate.

5 0
2 years ago
Read 2 more answers
Other questions:
  • Ray creates an energy transfer diagram for a hair dryer. However, the diagram contains an error that could be corrected in sever
    7·2 answers
  • Which set of terms represent mechanical waves?
    7·1 answer
  • At which of the following points does a roller coaster have the most potential energy? As it is going down a hill. At the top of
    7·1 answer
  • Find the work done in pumping gasoline that weighs 6600 newtons per cubic meter. A cylindrical gasoline tank 3 meters in diamete
    11·1 answer
  • What is capacitance?
    9·1 answer
  • Please Hurry will mark Brainliest
    10·2 answers
  • A 1.5kg cart moves along a track at 0.20m/s until it hits a fixed bumper at the end of the track. Find the average force exerted
    8·1 answer
  • Which substance can be separated by physical means and it is not the same throughout.
    11·2 answers
  • An air track car with a mass of 0.55 kg and velocity of 5.8 m/s to the right collides and couples with a 0.45 kg car moving to t
    9·1 answer
  • ou have been called to testify as an expert witness in a trial involving a head-on collision. Car A weighs 660.0 kg and was trav
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!