2: Reflection

Question 1

Specular vs diffused reflection

Answer 1

Specular: light wavelength larger than surface irregularities, beam reflected from shiny surface parallel (lake, mirror)
Diffuse: light wavelength smaller than surface irregularities, rays reflected in different directions (asphalt, wood, paper)

Question 2

Describe the 3 interactions between light and matter

Answer 2

Ray of light strikes object, can be ..
Reflected by reflector
Transmitted through transparent material
Absorbed by objects not allowing light to go through

Question 3

2 types of images

Answer 3

Real (can be focused on screen; movie)
Virtual (cannot be focused; mirror)

Question 4

Characteristics of images from camera obscura (pinhole)

Answer 4

Type: real
Orientation: inverted
Size: smaller than object

Question 5

Characteristics of images from plane mirrors

Answer 5

Type: virtual
Orientation: vertical, upright
Size, distance: same object
Position: horizontally inverted

Question 6

Images formed by convex mirrors

Answer 6

Virtual
Upright
Smaller than object
Distance from mirror smaller than object