Question:
When a bi-focal lens is designed with the use of a _____ at the lower half, and the least use of ____ on the upper part.
Author: Giftsy CagapeAnswer:
Convex lens
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1 answer(s) in total
Author
Giftsy Cagape
Answer:
0 / 5 Â (0 ratings)
1 answer(s) in total