Daily Challenge, 12/21

The distance from the front to the back of your eye is approximately 1.90 cm. If you see a clear image of your physics book when it is 35.0 cm from your eyes, what must the focal length of your cornea be?

Actually you can probably see a clear image of your book at a range of distances. Why? What does this tell you about the focal length of your cornea?

What happens to the image produced by a converging lens as you…

move the object further from the lens?

decrease the lens’ radius of curvature?

decrease the refractive index?

Dispersion Link

http://www.shermanlab.com/science/physics/optics/ThinLens.php

http://www.mtholyoke.edu/~mpeterso/classes/phys301/geomopti/lenses.html

http://physics.bu.edu/~duffy/classroom.html

Polarization

Plane-polarized light is light in which the oscillations are confined to a plane that includes the line of propagation.

Can be achieved by…Selective absorptionReflection at the “polarization angle”Refraction (e.g. calcite -> Nicol prism)

http://www.glenbrook.k12.il.us/GBSSCI/PHYS/CLASS/light/u12l1e.html#trans

Polarization

Daily Challenge, 12/22

A converging lens with a focal length of 15 cm is placed 53 cm from a light bulb. Where would you place a screen to focus an image of the object?

Daily Challenge, 12/23

Complete the “Light” crossword puzzle.