Question

D?

Answer 1

I got something a little different

wavelength = v/f = (3*10^8)/(5*10^14) = ?

Answer 2

A

Answer 3

perfect

Answer 4

kinda just have to know this ^_^

Answer 5

D

Answer 6

shorter wavelengths = higher energy

microwaves are much lower energy than visible light so microwaves have longer wavelengths


as a good memory device: infra means below in Latin and ultra means above, so ultraviolet means above violet, or above the visible light spectrum

making UV the best answer

Answer 7

lenses refract, mirrors reflect

Answer 8

C?

Answer 9

good

Answer 10

here are the charts that have to do with this

Answer 11

trying to teach myself this but since the mirror curves outward, is it convex or concave?

Answer 12

the mirror in your problem goes the other way so its convex

to distinguish between real and virtual, do the rays of light converge?

Answer 13

A convex lens, also known as a positive lens, is described as having thin edges and a thick middle surface. When rays of light pass through this lens the refracted rays of light, converge at one single point which is called a principal or focal point.

Read more: Difference between Real Image and Virtual Image | Difference Between http://www.differencebetween.net/technology/difference-between-real-image-and-virtual-image/#ixzz5Fm63EP9w

Answer 14

A real image is defined as one that is formed when rays of light are directed in a fixed point.

Read more: Difference between Real Image and Virtual Image | Difference Between http://www.differencebetween.net/technology/difference-between-real-image-and-virtual-image/#ixzz5Fm68VOYd

Answer 15

ok, but take a look at your problem - the solid line represents where the rays of light actually are, do the solid lines converge?

Answer 16

oh sorry i didnt know what you ere asking


Yes they do

Answer 17

notice how the bottom ray bounces off the mirror and doesn't intersect the first ray

so they don't converge, producing a virtual image

so convex mirror + virtual image

Answer 18

its either d or c

Answer 19

D?

Answer 20

uh

I really wouldn't know this one, if you plug in do = 50 and f = 25 you get D

your chart says focal length is negative for a convex mirror though so plugging in do = 50 and f = -25
gives

(50)(-25)/ (50+25)

Answer 21

well that would give me 16.3

Answer 22

should i just go with either c or d

Answer 23

my search says that focal length is negative and the image is behind the mirror so it has to be A

Answer 24

B

Answer 25

good

Answer 26

A

Answer 27

troughs and crests are for transverse waves

when the waves are ~compressed~ is this a compression or a rarefaction?

Answer 28

compression

Answer 29

good so compression = your sol'n

Answer 30

A

Answer 31

remember, if an object is [color] it has to absorb every color of light except [color]

Answer 32

so blue

Answer 33

good

Answer 34

C

Answer 35

good

Answer 36

x rays??

Answer 37

or maybe visivle light

Answer 38

unsure on thsi one

Answer 39

unsure on thsi one

Answer 40

unsure on thsi one

Answer 41

unsure on thsi one

Answer 42

unsure on thsi one

Answer 43

well done (x-rays not visible)

Answer 44

A

Answer 45

sound waves are mechanical and longitudinal which leads us towards answer choice..?

Answer 46

D

Answer 47

perfect

Answer 48

B

Answer 49

sound is proportional to 1/r^2 making the factor..?

Answer 50

1/9

Answer 51

good so which answer choice might this correspond to?

Answer 52

A

Answer 53

good

Answer 54

A

Answer 55

they're not perpendicular but there's another property that they share

Answer 56

C

Answer 57

good

Answer 58

C

Answer 59

not quite, changing the wavelength won't slow it down

remember that energy + wavelength are inversely related

Answer 60

so energy will increase

Answer 61

D

Answer 62

*inversely* related means that if one goes up the other goes down

wavelength goes up --> energy goes down (decreases)