A concave lens of focal length 20cm is placed in contact with a plane mirror will act as?
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Answered by
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10 cm
Steps:
1/F=2/f+1/fm
fm = infinity
then F=f/2
20/2 = 10
Steps:
1/F=2/f+1/fm
fm = infinity
then F=f/2
20/2 = 10
Answered by
3
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