Optics Exam Review

Question 1

What is the visible spectrum

Answer 1

Red, Orange, Yellow, Green, Blue, Indigo, Violet

Question 2

Why are LEDs better than Incandescent lights

Answer 2

LEDs are more efficient, last longer, no heat produced

Incandescent waste energy and produce heat

Question 3

What is the formula for the Index of Refraction

Answer 3

N= index of refraction
C= speed of light
V= speed in medium
(remember the triangle)

Question 4

What is the formula for Snells Law

Answer 4

NiSin0i=NRSinOR

Question 5

What are the rules of refraction

Answer 5

Incident ray and refracted ray are on opposite sides, light bends towards the normal

Question 6

What is SALT

Answer 6

S=size
A=attitude
L=location
T=type

Question 7

What will an Image look like on a Plane Mirror

Answer 7

Image will be same distance away, object line is perpendicular to the mirror surface

Question 8

What will a Image look like in a Concave Mirror

Answer 8

Beyond C= smaller, inverted, between c/f, real
At C= same, inverted, at c, real
Between C/F= larger, inverted, beyond c, real
At F, no image, no image, no image, no image
Between F/V= larger, upright, behind, virtual

Question 9

What will an image look like in an Converging Lens

Answer 9

Beyond 2F= smaller, inverted, between 2F, Real
At 2F= same, inverted, at 2F, Real
Between 2F/F= larger, inverted, beyond 2F, Real
At F= no image, no image, no image, no image, no image
Inside F= larger, upright, same side as object, virtual