Physics- Fiber Optics Practice Problems with Solutions

PHYSICS: FIBER OPTICS PRACTICE WORD PROBLEMS WITH SOLUTIONS


FIBER OPTICS
PHYSICS
PRACTICE WORD PROBLEMS WITH ANSWERS AND SOLUTIONS




Practice Word Problems


1) A microscope has an objective lens of a focal length of .60cm and an eyepiece of a focal length of .5cm. the lenses
are 23cm apart. An object with a size of .01cm is placed .62cm from the objective.
a) Calculate the location, size, and magnification of the image produced by the objective
b) Calculate the location, size, and magnification of the image produced by the eyepiece lens
c) Calculate the overall magnification of this microscope.


2) A certain amoeba with a size of 0.1cm is placed .305cm away from the objective lens of the microscope.
a) If the objective lens has a focal length of .3cm, where is the image that will be formed? What is its size?
b) If the eyepiece has a focal length of 2cm and is 20cm away from the objective lens, where will be the image
that is formed? Calculate its size.
c) What is the overall magnification?




Things to Remember:

Fiber Optics (Endoscope)
Telescope
o Reflective – 2 concave mirror
o Refractive – 2 convex lenses
Microscope
o Compound – 2 thin layers
o Objective lens – real image – object seen by the eyepiece
o Eye Piece Lens
o

(+) I → Right ( - ) m → Real (-) ℎl → 𝐼𝑛𝑣𝑒𝑟𝑡𝑒𝑑

( - ) I → Left (+) m = Virtual (+) ℎl → 𝑈𝑝𝑟𝑖𝑔ℎ𝑡



l/O = 𝑜𝑏𝑗𝑒𝑐𝑡 𝑑𝑖𝑠𝑡𝑎𝑛𝑐𝑒 I = 𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑜𝑓 𝑡ℎ𝑒 𝑖𝑚𝑎𝑔𝑒
l/I = 𝑖𝑚𝑎𝑔𝑒 𝑑𝑖𝑠𝑡𝑎𝑛𝑐𝑒
l/f = 𝑓𝑜𝑐𝑎𝑙 𝑙𝑒𝑛𝑔𝑡ℎ

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