- #1
nemzy
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A transparent photographic slide is placed in front of a converging lens with a focal length of 2.24 cm. The lens forms an image of the slide 11.4 cm from the slide.
(a) How far is the lens from the slide if the image is real?
(b) How far is the lens from the slide if the image is virtual?
I got the wrong answer, and i don't know why.
This is how i attempted part a:
a) focus=2.24 cm
q= 11.4 cm (positive, since the image is real)
1/p + 1/q = 1/f solve for p
b) i did same process except p = -11.4 cm (negative since virtual image)
But yet still got the wrong answer
What am i doing wrong? thanks
(a) How far is the lens from the slide if the image is real?
(b) How far is the lens from the slide if the image is virtual?
I got the wrong answer, and i don't know why.
This is how i attempted part a:
a) focus=2.24 cm
q= 11.4 cm (positive, since the image is real)
1/p + 1/q = 1/f solve for p
b) i did same process except p = -11.4 cm (negative since virtual image)
But yet still got the wrong answer
What am i doing wrong? thanks