a camera (which has a lens in it) must use that lens to producea real imageof wh

Question

a camera (which has a lens in it) must use that lens to producea real imageof whatever object you're taking a picture of. That's because youneed to project that image onto the film (i.e. you need actuallight rays to hit the film so you can record yourpicture).



Can you use a camera to take a picture of a virtual image? That is,what if you tried to point your camera at a virtual image...couldyou record that image? Why or why not?



I think I may know what this answer has to do with. I know that aregular, flat mirror produces a virtual image. If I stand in frontof a mirror, aim a cell phone camera at your reflection, I can seethat there is a picture. Is this right? Why can this work if it isactually virtual??

Explanation / Answer

I think we have to define "virtual" clearly. In my opinion, "virtual" image is defined as the image which isformed behind the mirror or behind the lens. and "real" image is defined as the image which is formed in frontof the mirror or in front of the the lens. we already know about "behind" the mirror, but how about behind thelens? may be we think that both side in lens are "front" but I think the front of the lens is the side where the object'splaced. Then I call the other side as "behind". Then, How can we see the image which are produced by a lens? The answer is "We can see the image with "screen" do not care that the images are virtual or real, we still usescreen to see the image. for example, our eyes have a retina as a screen, camera have a filmas a screen, For your question, can camera capture the virtual image? My Answeris yes but it depend on the position of the camera and the virtualimage. same case as the telescope or microscope. Both of them haveobjective lens which produce a virtual image. next this image areused by eyepiece (ocular lens) as an object to produce a secondvirtual image. This is my opinion, How about we discus it? please send me aprivate message if you are not clear. thanks

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