Science GA 1.2

Question 1

A German chemist that made us of metallic silver instead of mercury as a reflecting film, and thus invented the mirror we know today

Answer 1

Justus von Liebig

Question 2

-Is the bouncing back of light into the same medium it has been travelling after striking a surface

Answer 2

Reflection

Question 3

-A rectilinear ray of light that strikes a surface
-The angle between this ray and the perpendicular or normal to the surface is the angle of incidence

Answer 3

Incident Ray

Question 4

-A ray of light that is thrown back from a nonpermable or nonabsorbing surface
-This ray bounces back from the surface of reflection

Answer 4

Reflected Ray

Question 5

-This line divides the angle between the incident ray and the reflected ray into two equal angles

Answer 5

Normal

Question 6

-For this surface, reflected light rays travel in the same direction
-These surfaces cause specular reflection

Answer 6

Smooth Surface

Question 7

-For this surface, reflected light rays scatter in all directions
-These surfaces cause diffuse reflection

Answer 7

Rough Surface

Question 8

-Image formed by the actual intersection of reflected rays
-It is formed in front of the mirror and is always upside down relative to the object

Answer 8

Real Images

Question 9

-Image formed behind the mirror and is always upright relative to the object
-There is no actual intersection of reflected rays

Answer 9

Virtual Images

Question 10

-Creates a virtual image located behind the mirror
-Images formed by these are always virtual, upright, the same size as the object, located in the same distance behind the mirror, and laterally reversed

Answer 10

Plane Mirror

Question 11

-Are mirrors cut out from a spherical reflecting surface
-There are two types of spherical mirrors: concave and convex

Answer 11

Spherical Mirror

Question 12

Is the change in the direction of light when it passes from one medium to another of different optical densities. It occurs due to the change in the speed of light as light crosses the boundary of two different media

Answer 12

Refraction

Question 13

The ability of a material to transmit light through it

Answer 13

Optical Density

Question 14

The optical density of the material is indicated by

Answer 14

Index of Refraction/Refractive Index

Question 15

Is a piece of glass or transparent material that has at least one spherical surface. It may be convex or concave

Answer 15

Spherical Lens

Question 16

Lenses that are thicker in the middle than at the sides.

Answer 16

Convex Lenses

Question 17

What are the kinds of Convex Lenses

Answer 17

-Double Convex
-Plano-Convex
-Concavo-Convex

Question 18

Lenses that have thicker edges and are thinner in the middle

Answer 18

Concave Lenses

Question 19

What are the kinds of Concave Lenses

Answer 19

-Double Concave
-Plano-Concave
-Convexo-Concave

Question 20

These lenses produce both real and virtual images

Answer 20

Converging Lenses

Question 21

These lenses can only produce virtual images

Answer 21

Diverging Lenses

Question 22

Formula:
What does n stand for

Answer 22

Index of refraction of the material

Question 23

Formula:
What does c stand for

Answer 23

Speed of light in a vacuum (3x108 m/s)

Question 24

Formula:
What does v stand for

Answer 24

Speed of light in the material

Question 25

Formula:
What does n1 stand for

Answer 25

Index of refraction of the incident medium

Question 26

Formula:
What does n2 stand for

Answer 26

Index of refraction of the refractive medium

Question 27

Formula:
What does θ1 stand for

Answer 27

Angle of incidence

Question 28

Formula:
What does θ2 stand for

Answer 28

Angle of refraction

Question 29

Mirrors used in the 1300s made of glass plates with mercury or tin as a reflecting film

Answer 29

Crude Mirrors