.which mirror and lens?focal length -15cm
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Hey mate ...☺
Since the focal length is negative , it's concave mirror and concave lens
✌
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Since the focal length is negative , it's concave mirror and concave lens
✌
.
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The focal point F , positive (convex) lens, a negative (concave) lens, a concave(_) mirror, and a convex(+) mirror
Since its negative its concave mirror or lens
Since its negative its concave mirror or lens
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