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I posted this previously, but the answer I received was unclear and a concept we have...

I posted this previously, but the answer I received was unclear and a concept we have yet to talk about in my physics class. Can someone else give me a more clear explanation?

For part of our lab we drew an arrow on the face of a flashlight (that did not have a curved lens). We then shined the flashlight onto the wall and observed that the image was very blurry. the question asks "You may see a shadow of the arrow you drew, but you will not see a focused image on the wall. Explain why" Can you explain this?

is it because light is bouncing off parts of the arrow we drew on the flashlight and also going through it? Also why would putting a converging lens between the flashlight and the wall focus the image and make it more clear?

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Answer #1

Yes, the bouncing of light and there is some role of diffraction too .That is why the image on the wall is not very clear. Putting a converging lens between the flashlight and the wall redirects light rays that were being disturbed(bounced) due to the arrow mark.

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