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
Burka [1]
3 years ago
11

In a physics lab, light with a wavelength of 490 nm travels in air from a laser to a photocell in a time of 17.5 ns . When a sla

b of glass with a thickness of 0.800 m is placed in the light beam, with the beam incident along the normal to the parallel faces of the slab, it takes the light a time of 21.5 ns to travel from the laser to the photocell.What is the wavelength of the light in the glass? Use 3.00×108 m/s for the speed of light in a vacuum. Express your answer using two significant figures.
Physics
1 answer:
Gennadij [26K]3 years ago
6 0

Answer:

196 nm

Explanation:

Given that

Value of wavelength, = 490 nm

Time spent in air, t(a) = 17.5 ns

Thickness of glass, th = 0.8 m

Time spent in glass, t(g) = 21.5 ns

Speed of light in a vacuum, c = 3*10^8 m/s

To start with, we find the difference between the two time spent

Time spent on glass - Time spent in air

21.5 - 17.5 = 4 ns

0.8/(c/n) - 0.8/c = 4 ns

Note, light travels with c/n speed in media that has index of refraction

(n - 1) * 0.8/c = 4 ns

n - 1 = (4 ns * c) / 0.8

n - 1 = (4*10^-9 * 3*10^8) / 0.8

n - 1 = 1.2/0.8

n - 1 = 1.5

n = 1.5 + 1

n = 2.5

As a result, the wavelength of light in a medium with index of refraction would then be

490 / 2.5 = 196 nm

Therefore, our answer is 196 nm

You might be interested in
A rock is thrown horizontally from a bridge with a speed of 29.0 m/s. if the rock is 23.7 meters above the river at the moment o
mash [69]
It would be 1.5 meters im sure form that distance to me is that nswe

7 0
3 years ago
Describe the octet rule in terms of noble-gas configurations and potential energy
Wittaler [7]
Elements will gain or lose electrons to form a noble gas configuration. Atoms that meet the octet rule are stable because their valence electrons have a relatively low potential energy. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.


8 0
3 years ago
Read 2 more answers
What are the characteristics of the image based on the values?Check all that apply
Ahat [919]

inverted, real, behind the lens is the answer

8 0
3 years ago
Read 2 more answers
A boy 11.0 m above the ground in a tree throws a ball for his dog, who is standing right below the tree and starts running the i
ryzh [129]

12414253

Explanation:

8 0
2 years ago
A sound wave has a frequency of 510 Hz in air. Which of these is closest to the wavelength of this sound? (The speed of sound in
Dahasolnce [82]

Answer:

b) the length of car

Explanation:

This is because 520 divided by 343 m/s.) would equal the length of a car.

8 0
3 years ago
Other questions:
  • A beam of electrons is sent horizontally down the axis of a tube to strike a fluorescent screen at the end of the tube. On the w
    6·1 answer
  • Which of the following is best described as a synthesis reaction? (2 points) 2HgO → 2Hg + O2 AgNO3 + NaCl → AgCl + NaNO3 HCl + N
    13·2 answers
  • An electron accelerated from rest through a voltage of 780 v enters a region of constant magnetic field. part a part complete if
    15·1 answer
  • Does magnets exert a force. explain​
    5·1 answer
  • Electrons are accelerated through a voltage difference of 230 kV inside a high voltage accelerator tube. What is the final kinet
    9·1 answer
  • What is the potential energy of a 2,000-kg car parked at the top of a 30-m hill?
    9·2 answers
  • Two balloons having the same charge of 1.2 × 10-6 coulombs each are kept 5.0 × 10-1 meters apart. What is the magnitude of the r
    6·1 answer
  • Blank is how high or low you think a sound is
    9·2 answers
  • An apple is whirled round in a horizontal circle on the end of a string which is tied to the stalk. It is whirled faster and fas
    5·1 answer
  • The kinetic energy of the molecules inside the balloon _______ which
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!