optics 1

Question 0

What is the symbols for the 3 properties of light?

Answer 0

Na, f, upside down y

Question 1

What are the three properties of light?

Answer 1

Amplitude
Frequency
Wave length

Question 2

How do you measure wavelength, frequency and amplitude

Answer 2

Amplitude measure top of wave to line
Frequency is high if short wavelength and low with long wavelengths
Wavelengths you measure top to top of wavelentgth

Question 3

What is electromagnetic radiation?

Answer 3

A wave pattern made up of electric and magnetic fields that can travel through an empty space

Question 4

What is the electromagnetic spectrum?

Answer 4

The range where the electromagnetic radiation extends from the shortest gamma rays to the longest radio waves, and includes visible light.

Question 5

List the 7 parts of the spectrum in order?

Answer 5

Radio waves, microwaves, infrared waves, visible light,ultraviolet rays, x rays, gamma rays.

Question 6

What does the law of reflection state?

Answer 6

The angle of incidence always equals the angle of reflection

Question 7

What is the centre of curvature?

Answer 7

Imaginary circle the mirror makes

Question 8

What is the vertex?

Answer 8

Intersection of principle axis and mirror

Question 9

What is the focal point?

Answer 9

Principle focus

Question 10

What is the focal length?

Answer 10

Distance from f to v

Question 11

List salt?

Answer 11

Size
Attitude
Location
Type

Question 12

What is regular reflection?

Answer 12

Occurs on a smooth surface,all rays reflected are parallel to eachother so the image is not distorted.

Question 13

Diffuse reflection?

Answer 13

Occurs on a bumpy,all rays are that are reflected are scattered so the image is distorted

Question 14

Why do we see reflections?

Answer 14

Because of how light reflects off a surface and the type of surface or reflects off of.

Question 15

What is the difference between opaque, translucent, and transparent?

Answer 15

Opaque- light cannot pass through
Translucent- some light can pass through
Transparent- all light passes through

Question 16

What is the difference between luminous and non luminous objects?

Answer 16

Luminous-

Non luminous- donor emit light, moon

Question 17

What are concave mirrors designed to do?

Answer 17

Collect light and bring it to a single point

Question 18

Why are convex mirrors used?

Answer 18

Diverging mirrors, spread out light, produce a virtual image that is upright and smaller than the object

Question 19

What is a drawback to convex mirrors?

Answer 19

If you look in one it appears as if the image is originating from a smaller point behind the mirror.

Question 20

List three example where convex mirrors are used?

Answer 20

Security cameras, vehicles rear view mirrors, automachanic teller machines and computers

Question 21

List three examples of whe concave mirrors are used?

Answer 21

Flashlights, car headlights, telescope

Question 22

How do you determine magnification?

Answer 22

M=hi/ho

M=di/do

Question 23

What is the thin lens equation?

Answer 23

1/f= 1/do+1/di

Question 24

What happens to the image if the object is closer than f, at f,between f and 2f , and farther than 2f?

Answer 24

Closer than f- larger, upright At f- none Between f and 2 f- larger, inverted vertically Larger than 2 f- smaller, inverted vertically

Question 25

What is total internal reflection?

Answer 25

Light reflects completely off the inside wall of a denser medium rather than passing through the wall into a less dense medium.

Question 26

Define refraction?

Answer 26

The bending of light rays as they pass between two different media

Question 27

What is the index of refraction?

Answer 27

The amount by which a transparent medium decreases the speed of light is indicated by a number.

Question 28

What is the formula for the index of refraction?

Answer 28

Index of refraction= speed of light/ speed of light in medium

Question 29

What is the math triangle for index of refraction?

Answer 29

N=c/v