- #1
ellieee
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- 6
- Homework Statement
- why will angle of incidence on the surface of the lens be greater when point light source is nearer to the lens?
- Relevant Equations
- nil
nil
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The discussion centers on the relationship between the angle of incidence and the distance of a point light source from a lens. It highlights that as the light source approaches the lens, the angle of incidence increases due to the geometry of light rays converging at a sharper angle. Participants suggest using diagrams to visualize this concept effectively. Understanding this principle is crucial for applications in optics and lens design. Overall, the conversation emphasizes the importance of visual aids in grasping optical phenomena.
The answer is (B) but I don't really understand why.
Based on formula of Young Modulus:
$$x=\frac{FL}{AE}$$
The second wire made of the same material so it means they have same Young Modulus. Larger extension means larger value of ##x## so to get larger value of ##x## we can increase ##F## and ##L## and decrease ##A##
I am not sure whether there is change in ##F## for first and second wire so I will just assume ##F## does not change. It leaves (B) and (C) as possible options so why is (C)...
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