how to find focal length of a concave lens practically
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To find Focal length of a concave lens practically :
1. Place a concave lens in front of a sunlight as sunlight will act as object at infinity distance.
2. Concave lens form a virtual image at principle focus of an Object placed at infinity.
3. Place a white screen in front of a concave lens as the image is virtual and at same side that of object.
4. Adjust the screen in such a way that a sharp and point sized image is obtained on a screen.
5. Now mark that point which is focus point of concave lens.
5. Now, for obtaining focal length measure the distance between optic centre and the focus.
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Hope you understood it !
No need of brainliest and thanks for points :-)
1. Place a concave lens in front of a sunlight as sunlight will act as object at infinity distance.
2. Concave lens form a virtual image at principle focus of an Object placed at infinity.
3. Place a white screen in front of a concave lens as the image is virtual and at same side that of object.
4. Adjust the screen in such a way that a sharp and point sized image is obtained on a screen.
5. Now mark that point which is focus point of concave lens.
5. Now, for obtaining focal length measure the distance between optic centre and the focus.
=======================================
Hope you understood it !
No need of brainliest and thanks for points :-)
vishagh:
Y no need of brainliest!??
Yes I think.He is already an Genius.
But I think it should get brainliest.The answer is really good.
Thanx ARL,
OK, if you find it helpful.... mark it as brainliest ! (^_^)
Don't say thanks SARDARshubm (^_^)
*It's (shubham) , arunima !
Sorry Shubham.Next time I will be more careful.
Apology accepted 'Reveur' ! :-)
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