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# A person decides to use an old pair of eyeglasses to make some optical instruments. He knows that the near point in his left eye is 50.0 cm and the near point in his right eye is 100. cm. (a) What is the maximum angular magnification he can produce in a telescope? (b) If he places the lenses 10.0 cm apart, what is the maximum overall magnification he can produce in a microscope? Hint: Go back to basics and use the thin-lens equation to solve part (b).

## a. 1.50b. 1.90

#### Topics

Electromagnetic Waves

Wave Optics

### Discussion

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##### Christina K.

Rutgers, The State University of New Jersey

##### Jared E.

University of Winnipeg

### Video Transcript

{'transcript': "So we have a telescope being built from from two off the four of the ambulances we have. Ah, the first lens has a focal lens off five centimeters. The 2nd 1 with 10 intimidators deterred one with 20 20 meters and the fourth with 30 sent team enters. Okay, so we went to Butte. A telescope with maximum magnification. So since we know the magnification is just the focal objective divided by the focal eyepiece, we just need tow. This mall is smaller. Focal s to be in the eyepiece and the greater one to be in the objective. So the greater maximum magnification just going to be the first ID. And this the maximum magnification is just going to be authority divided by five. So the maximum magnification needs to be six. So since we use the telescope one and four, the second item of the problem, we need to calculate Ah, this barrel length off this telescope. So the barrel and with a telescope is just this some off the focal lens. So it's just authority plus five. So the barrel ends is just 35 70 metres. And that's the final answer to this problem. Thanks for watching"}

Other Schools

#### Topics

Electromagnetic Waves

Wave Optics

##### Christina K.

Rutgers, The State University of New Jersey

##### Jared E.

University of Winnipeg