HW 2 Due Sep 7 Chapter 2 P

HW #2, Due Sep. 7 Chapter 2 P 7, P 12, P 16, PH 1, PH 2

This Lecture: Chapter 2 Geometric Optics Reading Assignment: All Chapter 2 By the way, what is refractive index? !!

Geometrical Optics (Chapter 2) When objects are much larger than the wavelength Light Rays (Ray Optics)

Shadows *Shadow-point source http: //www. techxhome. com/lightsite/optics/shadows/point. Shadow. html *Shadow: Extended Source http: //www. techxhome. com/lightsite/optics/shadows/extended. Shadow. html

Solar Eclipse: Aug. 11 1999 SUN Moon Earth

The Lunar Eclipse

Pinhole Camera *Pinhole Camera http: //www. techxhome. com/lightsite/optics/pinhole. html

Depth of Image and more 2 pinholes

The effect of pinhole size

Diffraction

Reflection *Oscillating Charge Field http: //www. colorado. edu/physics/2000/applets/fieldwaves. html

Law of Reflection Normal

Mirrors Why metals reflect light? Why do they appear certain color? Why can we listen to radio stations far away? • Silvered and half-silvered mirrors • First-surface and second-surface mirrors *Oscillating Charge Field http: //www. colorado. edu/physics/2000/applets/fieldwaves. html

• Reflectivity (how much is reflected? ) • Grazing Incidence Reflection (glass windows, water surfaces, waxed floors, etc. )

Who sees me in the mirror? ! (field of view)

Sun Pillars and Sub Suns

Ice Crystals

Sub Sun A bright subsun looking downwards from 11, 000 m over Italy, late afternoon 18 th July 1995. The halo was intermittently visible over the southern and central parts of the country covered by a thin cirrus sheet. The halo elongated and contracted as the tilts of the plate crystal mirrors changed. Reflections from lakes and rivers shine through the cloud. Video by Les Cowley.

Sub Sun

http: //www. members. tripod. com/~regenbogen/englisch/atlas. htm

Sun Pillar

Multiple Reflections Example: Second Surface Mirrors

Corner Reflectors