COVID-19: How to Stay Safe & Healthy

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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.
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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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ellieee said:
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
Have you tried drawing a diagram?
 

Thread 'Bernoulli vs real life experiment'

If have close pipe system with water inside pressurized at P1= 200 000Pa absolute, density 1000kg/m3, wider pipe diameter=2cm, contraction pipe diameter=1.49cm, that is contraction area ratio A1/A2=1.8 a) If water is stationary(pump OFF) and if I drill a hole anywhere at pipe, water will leak out, because pressure(200kPa) inside is higher than atmospheric pressure (101 325Pa). b)If I turn on pump and water start flowing with with v1=10m/s in A1 wider section, from Bernoulli equation I...
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