Answer by blanci for Why is the center of a torch beam visible even through...
Notice there seem to be two focused spots near the centre which must come from reflection from the torch back mirror which is wider than the finger.. from around each side of finger producing the two...
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Nice photo and interesting problem!Without giving direct answer I think you should take the excellent opportunity you have to do more complete experiment and for example vary the distance of your...
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Answer by g s for Why is the center of a torch beam visible even through an...
For Ruslan - here is a diagram showing the difference between what is going on with a telescope and a flashlight - here depicted as a telescope that someone has turned into a very inefficient...
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Answer by g s for Why is the center of a torch beam visible even through an...
Sorry all but Dale's and M. Enns' answers are wrong. Ben51's answer is half-right.The translucency of your finger is not what is causing this phenomenon. If you want you can test this with other...
View ArticleAnswer by Ben51 for Why is the center of a torch beam visible even through an...
I assume you are asking why the edges of a shadow are blurred, in this case so much so that the blur extends all the way to the middle of the shadow.The main reason is probably that the light source is...
View ArticleAnswer by Dale for Why is the center of a torch beam visible even through an...
The classification of matter as "opaque" or "transparent" is a little overly simplistic. Matter can interact with light through absorption, scattering, refraction, reflection, transmission, and others...
View ArticleAnswer by M. Enns for Why is the center of a torch beam visible even through...
Your finger is not as opaque as you think it is. This is shown by a heart rate / blood oxygen sensor that works by shining light through your finger tip.Here's a short video.
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Why is the center of a torch beam visible even through an opaque body like my...
I have noticed that my finger never seems to completely block out the light of a torch beam as the center (brightest part of the torch) would be visible through the shadow of my finger. I thought it...
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