three uses of concave lens
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4
Concave lens are used in following devices -;
1) Cameras. ...
2) Flashlights. ...
3) Lasers. ...
and etc
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2
1.It is used for making spectacles.
2.It's used in making toys like kaleidoscope
3.It is for making reflecting periscope which are used bu soldier's to watch there enemies while sitting in trenches.
2.It's used in making toys like kaleidoscope
3.It is for making reflecting periscope which are used bu soldier's to watch there enemies while sitting in trenches.
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