Examlex
An object is placed 25 cm in front of a lens of focal length 20 cm. 60 cm past the first lens is a second lens of focal length 25 cm. What is the resulting magnification of the object in this setup?
Oil-immersion Lens
A type of microscope objective lens used with a drop of oil to increase resolution by reducing light refraction.
Coarse Focus Knob
A control on a microscope that allows the user to make large adjustments in focus, moving the objective lens closer to or further from the specimen.
Lens-cleaning Solution
A specially formulated liquid used for cleaning and disinfecting optical lenses, including those in eyeglasses and cameras.
Brownian Movement
The random motion of particles suspended in a fluid, resulting from their collision with the quick atoms or molecules in the gas or liquid.
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