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
ololo11 [35]
3 years ago
5

A puddle of water has a thin film of gasoline floating on it. A beam of light is shining perpendicular on the film. If the wavel

ength of light incident on the film is 560 nm and the indices of refraction of gasoline and water are 1.40 and 1.33, respectively, what is the minimum thickness of the film to see a bright reflection? A puddle of water has a thin film of gasoline floating on it. A beam of light is shining perpendicular on the film. If the wavelength of light incident on the film is 560 nm and the indices of refraction of gasoline and water are 1.40 and 1.33, respectively, what is the minimum thickness of the film to see a bright reflection? a. 500 nm b. 200 nm c. 300 nm d. 100 nm e. 400 nm
Physics
1 answer:
erastovalidia [21]3 years ago
4 0

Answer:

D.

Explanation:

To solve the problem it is necessary to apply the concepts of Destructive and constructive interference. The constructive interference in tin film is given by

2t = (m+\frac{1}{2})\frac{\lambda}{n}

Where,

t = thickness

\lambda=Wavelenght

m= is an integer

n= film/refractive index

We use this equaton because phase change is only present for gasoline air interface, but not at the gasoline-water interface. <em>The minimum t only would be when the value of m=0 then</em>

2nt = \frac{\lambda}{2}

t = \frac{560nm}{4*1-4}

t = 100nm

Therefore the correct answer is D. The minimum thickness of the film to see ab right reflection is 100nm

You might be interested in
Generate description of the right hand rule for finding the magnetic field around a current carrying wire an tell how it is used
vladimir1956 [14]

Answer:

Right hand thumb rule : It is a rule used to find the magnetic field direction around current carrying wire .

Explanation:

It states that : "If you grasp conductor in your right hand such that thumb points in upward direction ,then the direction in which our finger curls gives the direction of magnetic field or magnetic lines of forces" .

This rule proves that :Current can give rise to magnetism .

Around every current carrying conductor there exist a magnetic field which can be easily felt .

According to this rule : When a current flows in upward direction ,the finger curls in anticlockwise direction and when direction of current reverses ,then the direction of field also reverses .

4 0
3 years ago
you are boiling water to make pasta. How could you descibribe the pot, water, and pasta using physical properties?
trasher [3.6K]

Answer:

Yes

Explanation:

As a personification

5 0
2 years ago
Read 2 more answers
Which processes cause rocks to be exposed<br> at Earth's surface? SC.7..6.2
seropon [69]

Answer:

weathering

Explanation:

5 0
3 years ago
What two bodily functions are increased by a warm up
drek231 [11]

1) Blood flow: increases during warming improving muscle and joint elasticity. This decreases the possibility of having an injury.


2) Body temperature: This causes the cellular metabolism to increase. It also causes vasodilatation that allows a greater supply of oxygen and nutrients.

6 0
3 years ago
Which of these is a unit of heat? <br> a. joule <br> b. degree celsius <br> c. kelvin <br> d. tesla
attashe74 [19]

-- Heat is a form of energy.
-- Joule is the SI unit of energy.
ergo
-- Joule is a unit of heat.

'Degree Celsius' and 'Kelvin' are units of temperature.
Heat and temperature are different things.
We won't go there right now.
3 0
3 years ago
Other questions:
  • This causes nickel and certain other metals to be magnetic.
    5·2 answers
  • The noble gases are the least what of any elements on the periodic table
    7·1 answer
  • A campus bird spots a member of an opposing football team in an amusement park. The football player is on a ride where he goes a
    13·1 answer
  • I need to know the answer and explanation if possible !
    12·1 answer
  • Legal concept establishing that evidence speaks for itself
    15·1 answer
  • Please help! I dont get it!
    9·1 answer
  • Sarah is sitting at the top of the slide in the school's playground. Which of the following changes will increase Sarah's kineti
    9·1 answer
  • Given that the mass of the Earth is 5.972 * 10^24 kg and the radius of the Earth is
    8·1 answer
  • Pls help will mark brain
    11·1 answer
  • A 2.8 kg rectangular air mattress is 2.00 m long, 0.500 m wide, and
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!