Practice for test

Consider 700 nm light ray, hitting a block of plastic at 40 degrees.  It refracts to an angle of 25 degrees.  Find:

- Index of refraction of plastic

- speed of light inside plastic

- wavelength inside plastic

- frequency of light

Consider a lens, focal length of -20 cm. An object is 30 cm in front of it.  Find:

- Image location

- type of image

- magnification of image