Test practice

1.  Consider a lens with a +30 cm focal length.  An object is 50 cm from the center of lens.  Find the following:

a.  type of lens
b.  location of image (di)
c.  type of image (real/virtual)
d.  magnification of image
e.  whether image is larger or smaller than original object
f.  whether image is upside-down or rightside-up
g.  where should you place the object so that you ONLY get virtual images

2.  Review from the older optics stuff:

Consider a rectangular plastic box (n = 1.8).  Light of wavelength 575 nm is sent into the block at a 40-degree angle (with respect to a normal line).  Find the following:

a.  frequency of light outside box
b.  speed of light inside box
c.  angle of light inside box
d.  frequency of light inside box
e.  wavelength of light inside box
f.  critical angle of this plastic