Science Week 4-6

Question 1

– has properties of waves and particles
– bounce off from reflecting surface called reflection

Answer 1

Lights

Question 2

– bouncing back of light

Answer 2

Reflection

Question 3

– the reflective image has a smooth surface

Answer 3

Specular

Question 4

the reflecting surface is rough then the reflective image will be distorted

Answer 4

Diffuse

Question 5

has no reflection or light cannot pass through; transfer of energy carried by the light waves to the particles of m

Answer 5

Absorption

Question 6

scattering of light and follows the law of reflection; the reflection of light

Answer 6

Scattering

Question 7

Law of reflection

Answer 7

• The angle of incidence is equal to the angle
• The incident ray, the normal to the mirror at the point of incidence, and the reflected ray all lie in the same place

Question 8

– any surface that is smooth to produce regular reflection of incidence upon it

Answer 8

Mirrors

Question 9

– produce regular reflection of light and follows the law of reflection Produces virtual, upright, semi size to object, same distance behind mirror, and laterally
reversed

Answer 9

Plane mirror

Question 10

– curved mirrors that can produce images that are different in shape, size, and
orientation with respect to the original object

Answer 10

Spherical mirror

Question 11

– inward (converging mirror); real or virtual, larger, same size,
smaller than the object

Answer 11

Concave mirror

Question 12

• outward (diverging mirror); reflected rays scatter or spread;
  virtual, upright, and smaller than the object

Answer 12

Convex mirror

Question 13

-if the distance of the object is less than the focal length
-if the object is between the mirror and the focus, it will be right side up and larger

Answer 13

Virtual

Question 14

• if the distance is greater than the focal length of the lens
  -farther than the focus, may appear upside-down, larger, or smaller

Answer 14

Real

Question 15

– bending of light as it passes from one medium to another
– change in the direction of light when it passes from 1 medium to another of different
optical density

Answer 15

Refraction

Question 16

– is the effect associated with the separation of light into colors by a prism

Answer 16

Dispersion

Question 17

Laws of refraction

Answer 17

1) Incident ray, refracted ray, and normal lies on the same plane

2) Denser to less dense bends away from normal

3) Less dense to denser bends toward normal

4) If the light hits the surface straight on (perpendicular), it doesn’t bend at all

Question 18

• is any transparent object with two nonparallel curved surface, or one plane surface
  and one curved surface

Answer 18

Lens

Question 19

-thicker in the middle; are called converging lenses because they bend (refract) parallel light rays toward each other, meeting at a single point
called the principal focus (F)

Answer 19

Convex lens

Question 20

– thinner middle and thick edges; is a diverging lens because it
spreads parallel light rays outward

Answer 20

Concave lens

Question 21

the point through will all light rays pass without being bent

Answer 21

Optical center

Question 22

is the distance from optical center to the principal focus

Answer 22

Focal length

Question 23

front of lens

Answer 23

Principal focus

Question 24

behind the lenses

Answer 24

Secondary focus

Question 25

the line joining the optical center and principal focus

Answer 25

Principal axis

Question 26

– evolves from a latin word/term (camera obscura) meaning dark chamber

Answer 26

Camera

Question 27

– produces virtual, upright, and enlarge image of an object

Answer 27

Magnifying glass

Question 28

makes small objects bigger and is invented by father and son team of Hans and Zacharias Janssen in 1950

Answer 28

Compound microscope

Question 29

use to differentiate cellular structures and introduced by Camillo Sebastian Nachet

Answer 29

Polarizing microscope

Question 30

to study cellular compounds like proteins and nucleic acids

Answer 30

Ultraviolet microscope

Question 31

uses electron beam instead of ordinary light and to examine size, shape, and arrangement

Answer 31

Electron microscope

Question 32

– to see distant object appear bigger

Answer 32

Telescope

Question 33

– first type of telescope and uses refract lens

Answer 33

Refracting telescope

Question 34

– uses concave mirrors

Answer 34

Reflecting type

Question 35

Properties of telescope

Answer 35

- How well it collects light - How much it magnify

Question 36

Uses to gather light

Answer 36

Aperture

Question 37

To enlarge image

Answer 37

Magnification

Question 38

– two refracting telescope mounted side by side – pair prism – “zoom lens” essentially a telescope mounted on camera

Answer 38

Binocular telescope

Question 39

– vector fields that are used to determine the distribution of magnetic force in areas inside or outside

Answer 39

Magnetic field

Question 40

– manifest interrelation between magnetism and electricity

Answer 40

Electromagnet

Question 41

– phenomenon in which electric current is generated by varying magnetic field – Changing magnetic field produces an electric current

Answer 41

Electromagnetic Induction

Question 42

– The force between the velocity and magnetic field are acting perpendicularly, the right- hand rule is used to determine the right direction of magnetic force

Answer 42

Right hand rule

Question 43

– change in magnetic flux, induces a current (hence induced emf)

Answer 43

Faraday’s law

Question 44

– paved the way for generating electricity, through the process known as electromagnetic induction

Answer 44

Michael faraday

Question 45

– proportional to the rate of change of the magnetic flux.

Answer 45

Induced EMF

Question 46

– the strength of a magnetic field measured in terms of the number of lines of force

Answer 46

Magnetic flux

Question 47

– the flux per unit area of a loop of wire perpendicular to the field.

Answer 47

Magnetic field

Question 48

– polarity of an induced EMF is such that it tends to produce a current which opposes the change in the magnetic flux

Answer 48

Lenz Law

Question 49

converts electrical energy to mechanical energy

Answer 49

Motors

Question 50

converts mechanical energy into electrical energy

Answer 50

Generators