Question

Two thing lens of power 4.5d and 2.50
are placed in contact. Find the power
and focal length of lens combination.​

Answer 1

Explanation:

Therefore, if two thin lenses of power +3.5D and -2.5D are placed in contact then the power and focal length of the lens combination will be 100m.

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Answer 2

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.