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the focal length of this

I was asked to compare my measured focal length to my calculated focal length. My calculated focal length I figured out by using
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2. asked by Lena
3. 551 views
What focal-length lens would you need to place next to a converging lens of focal length 29 cm to create an effective focal
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2. asked by Jeanette
3. 549 views
determine the type and focal length of a lens that has the same power as a combination of a thin converging lens of focal length
1. 1 answer
2. 149 views
A compound microscope has a barrel whose length is 17.4 cm and an eyepiece whose focal length is 1.7 cm. The viewer has a near
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2. asked by Beth
3. 690 views
A Simple Astronomical Telescope In Normal Adjustment Has An Objective Of Focal Length 100cm And An Eye Piece Of Focal Length 5cm
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2. asked by Godwin John
3. 568 views
A Simple Astronomical Telescope In Normal Adjustment Has An Objective Of Focal Length 100cm And An Eye Piece Of Focal Length 5cm
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2. asked by Godwin
3. 536 views
Two thin lenses one with 12 cm focal length and the other with a -6.0 cm focal length are placed 18 cm apart.Locate the final
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2. asked by JN
3. 538 views
The magnification of a telescope with an objective lens focal length of 80 cm and an eyepiece focal length of 2.0 cm isO 160x
1. 1 answer
2. 92 views
A compound microscope has an objective lens with a focal length of 1.5 cm and aneye piece of focal length 5 cm. It is focused on
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2. asked by Clandestine
3. 1,549 views
a convex lens of focal length 30cm is cut half perpendicular to its principal axes what is its new focal length
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2. asked by sehrish
3. 592 views