Practice Combination Of Thin Lenses In Contact (9.5.4) - RAY OPTICS AND OPTICAL INSTRUMENTS

Practice: Combination of thin lenses in contact

Lesson 9.5.4RAY OPTICS AND OPTICAL INSTRUMENTS

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8 questions

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2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the formula for calculating the effective focal length of two lenses in contact?
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Think about the relationship between individual focal lengths.
Question 2.
If Lens A has a focal length of 15 cm and Lens B has a focal length of 30 cm, what is the effective focal length?
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What happens when you find the common denominator?
3Question 3.
What is the effective focal length for two lenses with focal lengths of 12 cm and 18 cm?
- 7.2 cm
- 27 cm
- 27/5 cm
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Think about how focal lengths combine.
4Question 4.
True or False: The total magnification of a system of lenses is always less than the magnification of either lens alone.
- True
- False
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Consider how magnifications combine.
Question 5.
Consider two lenses placed in contact, one with a focal length of 5 cm and the other with a focal length of 20 cm. Calculate the effective focal length and total magnification if the first lens is used as a microscope objective.
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Use the effective focal length formula first, then the magnification concept.
Question 6.
Design a simple optical system using three thin lenses in contact. Describe their purpose, effective focal length, and magnification characteristics.
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Consider what each lens contributes and how you adjust the calculations.

4 more questions in this section. Enroll free to practise them all.