Physics #1 quiz

Question 1

what is light

Answer 1

a form of electromagnetic radiation that can be seen by the eye.

Question 2

electromagnetic radiation

Answer 2

waves created by the motion of electrically charged particles

Question 3

speed of light

Answer 3

300, 000, 000 meters/second
3 x 10^8 or 300 000 km/s

Question 4

different forms of electromagnetic radiation. types of light is based on wavelength. name 6 from greatest to least amount of wavelengths

Answer 4

-xrays
-ultraviolet
-violet light
-red light
-microwave
-radio

Question 5

shortest wavelength

Answer 5

xrays

Question 6

our eyes can detect or see objects that…

Answer 6

emit light or reflect light

Question 7

Different types of light emission

Answer 7

-natural ex. sun
-artificial ex. light bulb

light from these sources are called white light because they are a mixture of different colors

Question 8

bioluminescence

Answer 8

emission of light by a living organism through a chemical reaction
ex. jellyfish

Question 9

phosphorescence

Answer 9

emission of light by a material after being exposed to ultraviolet radiation or other types of radiation
ex. glow in the dark items

Question 10

chemiluminescence

Answer 10

emission of light through chemical reaction
ex. glowstick

Question 11

triboluminescence

Answer 11

emission of light by a material that undergoes friction and/or results from breaking of certain crystals
ex. cutting gems & diamonds

Question 12

incandescence

Answer 12

emission of light by heating a solid
ex. incandescence bulb, electric stoves, fireworks

Question 13

fluorescence

Answer 13

the emission of light by a material while exposed to ultraviolet radiation
ex, fluorescent light bulb

Question 14

reflection

Answer 14

the change in direction of a wave when it reaches a surface and bounces off that surface. is the bouncing back of light from any surface

Question 15

light is perceived is dependent on the surface

Answer 15

1. reflected from a smoot surface at a definite angle
   2 reflected from a rough surface and reflection is diffused in different directions

Question 16

geometric optics

Answer 16

determining the path of light rays when they strike an object

Question 17

mirror

Answer 17

any polished surface that exhibits an image

Question 18

image

Answer 18

reproduction of an original object that is produced through the use of light

Question 19

reflection

Answer 19

change in direction of a wave when it reaches a surface and bounces off that surface. -bouncing back of light from any surface

Question 20

transparent, translucent, opaque

Answer 20

transparent: glass
translucent: frosted glass
opaque: a rock

Question 21

image

Answer 21

picture of an object produced by light. it appears when light rays from an object meet (or appear to meet)

Question 22

SALT

Answer 22

size: smaller, larger, same
attitude: upright, upside down
location: behind, in front
type: real, virtual

Question 23

image in plane mirror

Answer 23

-always virtual
-reflected rays forms an image on the retina at the back of their eye
-brain interprets the image as behind the mirror
-always same size, upright, behind mirror, and virtual

Question 24

concave (converge) mirrors

Answer 24

-inner surface mirror is reflective
-ex. car headlights, makeup (magnified) mirrors, satellite dishes

Question 25

convex (diverging) mirror

Answer 25

-outer surface of mirror is reflective
-ex. security mirrors in stores, side-view mirrors on cars
-light rays spread apart or diverge when light strikes a convex mirror

Question 26

center of curvature (C)

Answer 26

the center point of a sphere with the same curve as the mirror

Question 27

vertex

Answer 27

point where principal axis meets the curves mirror

Question 28

principle axis (PA)

Answer 28

line between C and V

Question 29

focus

Answer 29

point where the light rays coming in (parallel to the PA) meet after being reflected off the curved mirror