Ray Diagram: Small Bulb & Convex Lens

[marla1]

Homework Statement

A small bulb is placed in front of a convex lens.

a) Suppose that the bulb is placed as shown. Using all three principal rays, draw an accurate ray diagram to determine the location of the image. Label the image location.

--------------.F-------0(Lens)-------.F--------------------
.Small bulb

b) Repeat part a for the case shown at right, in which the bulb is farther from the lens.
--------------.F-------0(Lens)-------.F--------------------
.Small bulb

c) Suppose that in each case above you were to place a small paper screen at the image location. What would you see on the screen in each case? Imagine that the room is dark except for the small bulb.

d) The light bulb is placed at one focal point of the lens as shown below. Draw at least five rays from the bulb that pass through the lens.
------------.F(Small bulb at focal point)------0(Lens)-------.F-----------------

Where is the image located in this case? Explain. (Hint: How are the rays that have passed through the lens oriented? From where do these rays appear to have come?)

Homework Equations

Not sure?

The Attempt at a Solution

For part a, I think there would be a parallelogram-shaped diagram through the top middle and bottom of lens.

For part b, as the small bulb moves further away, I think the diagram would flip?

For part c, if you placed a small paper screen, I think you would see a circle of light?

For part d, I think the five rays would be evenly spaced throughout the lens.

For the last question, The image would be located in front of the lens?

Help with this problem/thoughts/answers/reasoning would be EXTREMELY helpful! Thanks in advance! See better pictures/sheet attached.

 

[hutchphd]

You need to carefully draw and submit careful ray traces for thr three indicator rays (acually there are an infinite number for the object at focus). That is the only good way to proceed.