Please use the image to answer question 22 not 21 Question 22 Where will the fir
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Question
Please use the image to answer question 22 not 21
Question 22
Where will the first image be located?
To the left of F1.
Between F1 and L1.
Between L1 and F1&2.
Between F1&2
and L2.
To the right of L2.
To the left of F1.
Between F1 and L1.
Between L1 and F1&2.
Between F1&2
and L2.
To the right of L2.
Real world optical systems, such as telescopes or microscopes, use multiple lenses. In the case of the two-lens system shown here: the image l1 of the object O1 generated by the first lens (L1) becomes the object O2 for the second lens (L2). The object is 40 cm from the first lens. The lenses are identical with a power of 6.67 D. To the nearest whole number, what is the focal length in centimeters of one of these lenses?Explanation / Answer
The power of lens is 6.67 D ==> f = 1/ 6.67 m = 15 cm
The thin lens equation is
1/ O1 + 1/ I1 = /1 f1
1/ I1 = 1/ 15 cm - 1/ 40 cm
I1 = 24 cm.
The object of second lens is O2 = d - I1 = 30 cm - 24 cm = 6 cm
The first image is located between F1&2 and L2