only answer A and B and if possible C
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The image is located 15 cm from the lens and is twice as the large as the object, so:
m = h(i)/h(o) = -d(i)/d(o).
(a) Since h(i)/h(0) = 2:
2 = -d(i)/d(o) ==> d(i) = -2d(o) = (-2)(-15) = 30 cm.
(b) To solve this, use:
1/f = 1/d(i) + 1/d(o).
So:
1/f = 1/(-30) + 1/(-15) ==> f = 1/(-1/30 - 1/15) = -10 cm.
(This makes sense since f < 0 for a convex lens.)
(c) I cannot draw this on here, so you will need to do this on your own.
I hope this helps!
m = h(i)/h(o) = -d(i)/d(o).
(a) Since h(i)/h(0) = 2:
2 = -d(i)/d(o) ==> d(i) = -2d(o) = (-2)(-15) = 30 cm.
(b) To solve this, use:
1/f = 1/d(i) + 1/d(o).
So:
1/f = 1/(-30) + 1/(-15) ==> f = 1/(-1/30 - 1/15) = -10 cm.
(This makes sense since f < 0 for a convex lens.)
(c) I cannot draw this on here, so you will need to do this on your own.
I hope this helps!
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me also confused...;P
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Sure. The answer is B.
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