Question

student use spectacles of number + 3 for sending objects commonly used lenses for a sending subject commonly used lenses for his spectacles are ______
1 bi-concave
2.double-concave
3.cancavo-convex
4. convex lens
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Answer 1

Answer:

PLEASE MARK AS BRAINLY I NEED HELP

Answer 2

Answer:

A student uses spectacles of number-2 for seeing distant objects. commonly used lenses for his spectacles are

1.Bi-cocave