Identifying substances using critical angle

  • Thread starter Thread starter Derosion
  • Start date Start date
  • Tags Tags
    Angle Optics
AI Thread Summary
The discussion centers on identifying angles of incidence that result in total internal reflection for diamond and benzene, given their critical angles of 24 degrees and 42 degrees, respectively. Angles of incidence below the critical angle will not produce total internal reflection; thus, only angles of 20 degrees and 25 degrees would result in total internal reflection for diamond, while 30 degrees, 35 degrees, 40 degrees, and 45 degrees would apply to benzene. Additionally, there is a question about identifying a substance with a critical angle of 47 degrees, with participants directed to use an online resource for reference. The conversation emphasizes the need for clarity on critical angles and their applications in optics. Overall, the thread seeks assistance with understanding these concepts in the context of a homework assignment.
Derosion
Messages
1
Reaction score
0

Homework Statement



The critical angle for diamond is 24 degrees. The critical angle for benzene is 42 degrees. Which of the following angles of incidence would results in total internal reflection in diamond and which in benzene?

A)20 degrees B)25 degrees C)30 degrees D)35 degrees E)40 degrees F) 45 degrees

Homework Equations



Don't really know tbh.

The Attempt at a Solution



I was away for a couple of days so I'm a bit lost. These were questions that were given after I completed a lab.

If you guys would be kind enough to help me out, that would be great.

-----------------------------------------------------------------------------------------

Another question I have as well

Homework Statement



If the critical angle of a substance if 47 degrees, identify the substance. Use table 1, p. 437

Well, I can't show you guys my table. But here's a site where it shows you the table (indexes of refraction)
http://hyperphysics.phy-astr.gsu.edu/hbase/tables/indrf.html

Homework Equations



--

The Attempt at a Solution



--

Thanks guys :)!
 
Physics news on Phys.org
The http://en.wikipedia.org/wiki/Critical_angle" . (Click on the links)

Use Wikipedia :wink:
 
Last edited by a moderator:

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

What is the angle of incidence?
Replies
7
Views
2K
Critical angle: find the depth of the fish looking up
Replies
4
Views
3K
Finding the angle in which the resultant force points
Replies
8
Views
2K
Finding the angle of refraction
Replies
11
Views
7K
Maximum critical angle for total reflection?
Replies
5
Views
3K
How to find distance when a ball rolls slope with angle?
Replies
1
Views
1K
Optimizing Dolphin Tracking: Calculating the Angle for Dart Gun Accuracy
Replies
3
Views
2K
Determine the relationship between θB and θA
Replies
20
Views
2K
What is the relationship between critical angle and negative refractive index?
Replies
6
Views
2K
Calculating Incidence Angle for Tilted Plate and Light Source
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top