Question

Some lens charts that can maybe assist with my questions...

Answer 1

Now for my question

Answer 2

Its betweeen A and D but I pick D if I had choose.

Answer 3

@Nnesha

Answer 4

when m is negative => the image is inverted
when m is positive => the image is upright
when m is greater than 1 => image is larger than the object
when m is less than 1 => image is smaller than the object

Answer 5

m represent the magnification
and equation is \[\rm m=\frac{ h_i }{ h_o }=- \frac{d_i}{d_o}\]
according to the last table
d_o is always positive, and and given m is negative so that means d_i is negative in the equation

Answer 6

so chioce D

Answer 7

@Nnesha

Answer 8

m is less than or greater than 1 ?

Answer 9

Actually choice C

Answer 10

Because it is greater

Answer 11

correct

Answer 12

What about this do you have a chart for this @Nnesha

Answer 13

@Nnesha

Answer 14

do you know the shape of convex and convcave lens ?

Answer 15

so choice D

Answer 16

which one is convex Lens/convex Mirror
and which one is concave mirror and concave Lens

Answer 17

a and c is convex

b and d are concave

Answer 18

a is not convex

Answer 19

im sorry concave

Answer 20

is it mirror or lens ? match it with the picture i posted

Answer 21

wait isn't a convex

Answer 22

https://prnt.sc/jhs8vj

Answer 23

oh it looks like the one below that

Answer 24

so that is a mirror

Answer 25

yes

Answer 26

so that would be one of the answers

Answer 27

https://prnt.sc/jhsacn

Answer 28

now compare that with your 2nd table

Answer 29

choice A because concave is negative

Answer 30

https://assets.questioncove.com/attachments/1526306395-5af994c61b0fc1633f6e0e00-ch-25-light-reflection-mirrors-48-728.jpg

Answer 31

there are two diff vocab
Concave mirror and concave lens

Answer 32

Oh okay

I get it

Answer 33

The question is asking for the negative value of f not positive.

Answer 34

im comparing it to my second table

Answer 35

for mirrors it is negative

Answer 36

for convex mirrors

Answer 37

and concave lenses it is negative

Answer 38

B and D

Answer 39

SO choice letter C

Answer 40

correct

Answer 41

A

Answer 42

referring to this

Answer 43

it says m would be - for an inverted object

Answer 44

ya there

Answer 45

yes that's the right(if you are away from the focal point then the image will be inverted ..just saying i don't this info is necessary for this question)

Answer 46

i don't think*

Answer 47

D

Answer 48

this one is A

Answer 49

C

Answer 50

@Nnesha this would be c right

Answer 51

how did you get C?

Answer 52

do= 10.0
f=-40

-400/-30

Answer 53

D

Answer 54

hmm
make sure you compare the vocab with the tables
It says *convex Lens* and F is positive for convex lens(mentioned on the table #2)
`d_o `represents the object distance which is 40cm

Answer 55

\(\color{#0cbb34}{\text{Originally Posted by}}\) @zarkam21
do= 10.0
f=-40

-400/-30
\(\color{#0cbb34}{\text{End of Quote}}\)
if f=-40 and and d_o=10\[\frac{ (10)(-40) }{\color{Red}{ 10-(-40) }} \cancel{=}\frac{ -400 }{\color{Red}{ -30}}\]

Answer 56

still getting 13.3

Answer 57

but neg so A

Answer 58

red one is pointing out the mistake
10-(-40) is not equal to -30

Answer 59

do=40cm
f=10 cm
\[d_i=\frac{(40)(10)}{40-10}=\frac{400}{30}\]

Answer 60

Oh okay so choice A

Answer 61

I mean D????

Answer 62

yes

Answer 63

A

Answer 64

D was wrong ?

Answer 65

I said A for this one

Answer 66

It depends if the image is real or virtual ...

Answer 67

well real is positive and virtual is neg

Answer 68

yah ok hmmm then what makes you pick A for the answer ?

Answer 69

I think its d now that I think of it becayse it concave is pos

Answer 70

convex is pos**

Answer 71

?

Answer 72

yes go with D.

Answer 73

i just have 2 more questions

Answer 74

A

Answer 75

Looks right.