Chapter 11 Terminology

Question 1

Geometric optics

Answer 1

The science on hi light reflects nd bends

Question 2

Image

Answer 2

A reproduction of an object produced by an optical device like a mirror

Question 3

Optical device

Answer 3

Any technology that uses light

Question 4

Normal

Answer 4

And she’s line drawn perpendicular to the mirror at the point of reflection

Question 5

Incident ray

Answer 5

The incoming ray

Question 6

Angle of incidence

Answer 6

The angle between the incident ray and the normal

Question 7

Angle of reflection

Answer 7

The angle between the reflected ray and the normal

Question 8

Law of reflection

Answer 8

When light reflects off a surface, the angle of incidence is always equal to the angle of reflection

Question 9

Plane mirror

Answer 9

Any mirror that has a flat reflective surface

Question 10

Virtual image

Answer 10

Any image formed by rays that do not actually pass through the location of the image

Question 11

Focal point

Answer 11

The point where light rays meet or appear to meet is the focal point

Question 12

Vertex

Answer 12

The middle point of a curved mirror

Question 13

Focal length

Answer 13

The distance from the vertex to the focal point of a curved mirror

Question 14

Real image

Answer 14

An image formed by light rays that converge at the location of the image

Question 15

Concave mirror

Answer 15

Converging mirror has a surface that curves inward like a bowl

Question 16

Solar oven

Answer 16

A device that uses light from the sun as its energy source

Question 17

Magnification

Answer 17

The measure of how much larger or smaller an image is compared with the object itself

Question 18

Convex mirror

Answer 18

A diverging mirror a mirror with a surface curved outward

Question 19

Optical fibre

Answer 19

A thin transparent glass tube that can transmit light even around corners

Question 20

Medium

Answer 20

A material that is being used or undergoing a process

Question 21

Refraction

Answer 21

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

Question 22

Index of refraction

Answer 22

The amount by which a transparent medium decreases the speed of light

Question 23

Dispersion

Answer 23

The refraction of white light into separate wavelengths or colours

Question 24

Snells law

Answer 24

A formula that uses values for the index of refraction to calculate the new angle that a ray will take as a beam of light strikes the interface between 2 medi

Question 25

Total internal reflection

Answer 25

Light completely reflects off the inside wall of a denser medium

Question 26

Mirage

Answer 26

An image of a distant object produced as light refracts through air of different densities

Question 27

Lens

Answer 27

A curved transparent material that is smooth and regularly shaped so that when light strikes ittye light refracts in a predictable and useful way

Question 28

Axis of symmetry

Answer 28

An imaginary vertical line drawn through the optical centre of a lens

Question 29

Concave lens

Answer 29

A diverging lens it’s thinner in the centre than at the edges

Question 30

Thin lens

Answer 30

A lens that has a thickness that is slight compared to its focal length

Question 31

Convex lense

Answer 31

Converging lens