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
Jobisdone [24]
3 years ago
9

The blue laser in a blue ray DVD player is 405nm laser in vacuum. The aser strikes a quartz crystal with index of refraction 1.4

6 at normal incidence. The power of the laser is 0.25W and I'm guessing the beam is circular with radius 0.1mm. What is the intensity of the light transmitted into the crystal? Select One of the Following: (a) 7.7 x 10 (b) 1.5 x 106 W (c) 6.5 x 10% W (d) 2.85 (e) Toby.
Physics
1 answer:
almond37 [142]3 years ago
7 0

This question has mistakes.the correct question is

The blue laser in a blue ray DVD player is 405nm laser in vacuum. The aser strikes a quartz crystal with index of refraction 1.46 at normal incidence. The power of the laser is 0.25W and I'm guessing the beam is circular with radius 0.1mm. What is the intensity of the light transmitted into the crystal? Select One of the Following:

(a) 7.7 x 10⁶ W/m²

(b) 1.5 x 10⁶ W/m²

(c) 6.5 x 10⁶ W/m²

(d) 2.85 W/m²

(e) Toby.

Answer:

(a) 7.7 x 10⁶ W/m² Correct

Explanation:

The Intensity of laser is given as

I_{o}=P/A\\I_{o}=P/\pi  r^{2}\\ I_{o}=\frac{0.25}{\pi (0.0001)^{2} }\\ I_{o}=7.96*10^{6} \frac{W}{m^{2} }

The incident index of refraction and transmitted is

n_{i}=1\\ and \\n_{t}=1.46\\I_{t}=I_{o}-I_{r}\\  I_{t}=I_{o}-(\frac{n_{i}-n_{t}}{n_{i}+n_{t}})^{2}I_{o} \\  I_{t}=(1-(\frac{1-1.46}{1+1.46} ))*7.96*10^{6} \\I_{t}=7.7*10^{6}\frac{W}{m^{2} }

You might be interested in
When a jet lands on an aircraft carrier, a hook on the tail of the plane grabs a wire that quickly brings the plane to a halt be
Veronika [31]
The problem seems to be incomplete because there is no question. However, from the problem description, the logical question is to find he acceleration needed by the jet to land on the airplane carrier. The working equation would be:

2ad = v₂² - v₁²
Since the jet stops, v₂ = 0. Substituting the values:
2(a)(95 m) = 0² - [(240 km/h)(1000 m/1 km)(1h/3600 s)]²
Solving for a,
<em>a = -23.39 m/s² (the negative sign indicates that the jet is decelerating)</em>
8 0
3 years ago
Two football players are pushing a 60 kg blocking sled across the field at a constant speed of 2.0 m/s. The coefficient of kinet
MArishka [77]

Answer:

The sled slides d=0.155 meters before rest.

Explanation:

m= 60 kg

V= 2 m/s

μ= 0.3

g= 9.8 m/s²

W= m * g

W= 588 N

Fr= μ* W

Fr= 176.4 N

∑F = m * a

a= (W+Fr)/m

a= 12.74m/s²

t= V/a

t= 0.156 s

d= V*t - a*t²/2

d= 0.155 m

7 0
3 years ago
Which change would result in a stronger electromagnet?
Sonbull [250]
I'd say B.) Increasing the voltage of the battery.
6 0
3 years ago
Read 2 more answers
I Explain why you feel cold when tap or well water in winter. state with reason.<br><br>​
attashe74 [19]

Answer:

We feel cold when tap or well water in winter because heat flows from hot body to cold body.

Explanation:

Our <em>body</em><em> </em><em>is</em><em> </em><em>in</em><em> </em><em>optimal</em><em> </em><em>status</em><em> </em><em>is</em><em> </em><em>a</em><em> </em><em>hot</em><em> </em><em>body</em><em> </em><em>and</em><em> </em><em>tap</em><em> </em><em>or</em><em> </em><em>we</em><em>ll</em><em> </em><em>water</em><em> </em><em>is</em><em> </em><em>a</em><em> </em><em>cold</em><em> </em><em>body</em><em>.</em><em> </em><em>Theref</em><em>ore</em><em> </em><em>we</em><em> </em><em>feel</em><em> </em><em>cold</em><em>.</em>

3 0
2 years ago
What is the second most abundant element in the universe? <br> a. h <br> b. c <br> c. fe <br> d. he
Andru [333]
D I think I'm not sure!?.
7 0
3 years ago
Other questions:
  • Otis watches a cooking show on making mayonnaise. The chef dissolves salt and sugar in vinegar. She mixes in an egg yolk, and th
    9·2 answers
  • Which type of friction keeps a pile of rocks from falling apart?
    13·2 answers
  • Describe three common issues that affect societies across places and times
    7·1 answer
  • What energy is directly dependent upon velocity and mass?
    8·1 answer
  • A train crew was cleaning out a rail tanker that had been emptied of its contents. They rinsed the rail car out with scalding ho
    9·1 answer
  • What occurs at thermal equilibrium?
    7·2 answers
  • Tarzan swings on a 31.0 m long vine initially inclined at an angle of 36.0◦ with the vertical. The acceleration of gravity if 9.
    9·1 answer
  • The current interest in continental drift was started with the notion of sea- floor spreading, which was propounded by Hess and
    9·1 answer
  • 1. A kangaroo hops 84 m to the east in 7 seconds.
    9·1 answer
  • A student attaches a block to a vertical spring of unknown spring constant so that the block-spring system will oscillate if the
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!