Optics Problem: Duplicating Newton's Results with Lens and Prism

AI Thread Summary
The discussion focuses on replicating Newton's optical experiments using a lens and prism setup. A lens with a 10cm focal length is used to direct sunlight onto an equilateral prism made of crown glass, with the goal of analyzing light dispersion. Participants seek to determine the distance from the lens to the prism, the angle of deviation for greenish-yellow light at 589 nm, and the necessary angle of incidence for total internal reflection within the prism. Clarifications are made regarding the terminology of "upstream" and "downstream" focal points in relation to light direction. The conversation emphasizes the need for foundational understanding to tackle the optical problem effectively.
MJPause
Messages
2
Reaction score
0
We wish to attempt to duplicate some of Newton's results with a lens and prism. A lens with focal length 10cm is placed in a ray of sunlight, and a prism is placed at the "downstream" focal point of the lens. The light passing through the prism is broken into its component colors. If it is an equilateral prism (all of the prism angles are 60 degrees), made of crown glass (n=1.52), and the light is incident at a 30 degree angle to one face of the prism:

a. how far from the lens is the prism placed?
b. what is the angle of deviation for light (greenish yellow) of wavelength 589 nm?
c. what angle of incidence is required for total internal reflection within the prism?

I have no idea how to start or do this problem. HELP!
 
Physics news on Phys.org
MJPause said:
and a prism is placed at the "downstream" focal point of the lens.

what does this statement means>?
 
If f (which is the distance from the focal point to the lens) is positive, then the "upstream" focus is on the side of the incoming light and the "downstream" focus is on the side of the ongoing light.
 
so for a
you already specified that prism is at downstream focal point ...
 
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Correct statement about a reservoir with an outlet pipe'

Thread 'Correct statement about a reservoir with an outlet pipe'

The answer to this question is statements (ii) and (iv) are correct. (i) This is FALSE because the speed of water in the tap is greater than speed at the water surface (ii) I don't even understand this statement. What does the "seal" part have to do with water flowing out? Won't the water still flow out through the tap until the tank is empty whether the reservoir is sealed or not? (iii) In my opinion, this statement would be correct. Increasing the gravitational potential energy of the...
View full post »

Similar threads

I Prism Spectrometer Objective: Optics Question
Replies
9
Views
3K
Intensity of Light Through Pentaprism Including Reflections
Replies
16
Views
4K
Solving an Optics Exam Problem: Interference Fringes
Replies
9
Views
2K
5 Questions dealing with Optics, image included
Replies
1
Views
3K
Angle of Incidence on a spherical lens
Replies
1
Views
2K
Solve 3 Optic Problems in 2 Days
Replies
4
Views
2K
Prism Optics Range of Refraction Angles
Replies
7
Views
8K
A When should I analyze optical problems using ray tracing vs. wavefront analysis?
Replies
12
Views
464
Optics: Total Internal Reflection with Triangular Prisms
Replies
5
Views
6K
Calculating Angle of Deviation in a Prism
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top