Hi please help me with these 2 ray diagrams... the questions is as stated in the attachment..i have no idea where to start drawing and whatever i have drawn is wrong for both qns.. thanks alot experts!
First, please confirm or correct my guess as to which of the lines in the picture you had added. If confirming, please explain the basis on which you drew these lines.thanks so much for your input haruspex..but pardon me, i still can't grasp how should i draw it..should i be drawing the image of the light in the mirror? if my light ray coming from the torch is reflected in the mirror, should i be drawing an angle of incident and reflection at a normal to the mirror? really confused
Ok, that makes it clearer, but as I wrote in post #2 some of your lines do make sense and are useful. I'm asking you to explain why you drew those lines. This will help me lead you to the answer.hihi, sorry for the confusion, this is my test paper, all the lines drawn are wrong and just based on my guesswork, except for the normal. this is the original question, as attached. i have erased all the lines that were drawn wrongly, except for the normal at the plane mirror. thats the only thing i have gotten right so far. hope this is clearer now!
The given light ray from the torch won't do those things, but forget that light ray for the moment. Think about the torch as merely an object for which there will be images. You appear to have identified where its image will be in the mirror, and your lines from there through the lens midpoint and focal point lead you to another image, right? So where they meet indicates the position of what, exactly?Well I drew the lines thinking that the light ray gotta pass through one of the focal length, and another through the center of the lens. But that's totally wrong, the examiner totally marked it wrong.. So I don't think its correct. Maybe u can show me.what is the right drawing?
Or maybe because having arrows on them made the examiner think they were supposed to be part of the path of the light ray, not merely construction lines.Add the right red cross because the arrows on those lines point in the wrong direction ?
We seem to be back to your first picture, almost, and as I posted then, it is mostly correct. The one wrong line is the lowest line from the mirror image. It's fine from there, through the mirror, as far as the lens, but there's no way it is going to pass through the lens in a straight line.Is the drawing correct now?