Draw Double Concave Lens Diagram

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A double concave lens diagram requires the object to be placed between the lens and its focal point. The rays of light should be drawn parallel to the principal axis, diverging after passing through the lens. A suggested resource for creating the diagram is a Java applet that simulates lens behavior. The discussion clarifies that the diagram follows standard conventions for concave lenses. Understanding the basic setup resolves initial confusion regarding the task.
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Homework Statement




"Please draw an image for a double concave lens with the object paced between the lens and the focal point. Remember to show all the required rays, their direction, and the focal point of your lens"


Homework Equations



no equations needed.

The Attempt at a Solution



I do not have my notes on me at the moment and cannot find this diagram in the book, or the internet. Does anyone here know how this diagram would look?

if it is easier for you you can use this java applet: http://www.geocities.com/capecanaveral/hall/6645/Lens/lens_e.html
 
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Yes, the first thing that popped in the window, except with a concave lens instead of a convex lens, is what the problem is talking about. Just the standard lens diagram for a concave lens.

So the rays will go parallel-focus.
 
thank you, turns out i just didn't fully understand the question until you said it was just the standard.
 
Right, just do something like this


*f-------Obj-----------------Lens

or whatever variation you feel like.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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