# Lab 8 Execution

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Lab 8 Execution

Lab
Guest

## Re: Lab 8 Execution

I have a question

for Deltao/o

is deltao same value as h_o

if not is deltao the error .002 ??

matrix
Guest

## Re: Lab 8 Execution

i put 0.002 as the error for both ho and o.

does anyone know how to get the delta of f?

lab8
Guest

## error

anybody know how to get error of f? Tried the prelab formula and the prelab formula x f^2. Nothing works!

guestman
Guest

## Re: Lab 8 Execution

How are you guys drawing the sketch?

asds
Guest

.002

soc
Guest

## for error f

I got .0025 and it works

guest786
Guest

## error in f

to get the other errors follow the same idea

super mo
Guest

## k8

I can't get delta f for the life of me! help!

o [m] i [m]
0.316 0.066
0.0025 0.0025

F = 0.05459
thanks!

Delta F
Guest

## k8

sqrt((0.025/.316)^2+(0.025/0.066)^2)*0.05459 = 0.002112
if it is not being marked as correct try using 0.002 as per lab manual for the error and try the calculatoin again.

super mo
Guest

## k8

I just saw that I posted 0.025 I did in fact plug 0.0025 into the calculator. Sorry for the confusion.

super mo
Guest

## woot

awesome guys, thanks

:)
Guest

## help

I really need help in calculating the magnification for h_0 and h_i and the 2nd one with h and i

maria
Guest

## Re: Lab 8 Execution

never mind i got it.

maria
Guest

## Re: Lab 8 Execution

can anyone tell me what they are putting for "is the about vaule for f consistent with the nominal vaule of 5cm?" and also how to find magnification and errors? thanks

guesttt
Guest

## Re: Lab 8 Execution

I couldn't get the error of f, i tried the equation above and the one on prelab. please help

error of o, i = 0.0025
o = 0.072
i = 0.228
f = 0.05472

the delta f i got is 0.00199, but it wouldn't turn green. and is the focal length calculated consistent to the 5cm?

Thanks

error of
Guest

## calculating magnificatioin

hi can anybody help me on how to find magnification

newtothi
Guest

## Re: Lab 8 Execution

for the excel sheet, what # ur guys get for object xize h0 and image size hi? i have trouble on it

question
Guest

## Error or F

I know there are posted solutions for the error of f, but for some reason my value is not working!!

o: .061
i: .239
error: .002

f: .0485

and I keep coming out with .00164 as the error but its not working. this is driving me crazzzzyyy, is there an error with the excel sheet or something, or is everyone getting it fine?

PHygirl
Guest

## New Excel Sheet

I was having trouble on the error of f too but they posted a new excel sheet and my number works now

_Guest
Guest

## error of f

im using the excel sheet thats posted now and its STILL not working tho. my error of f is really driving me up a wall.

o: .061
i: .239

error for both: .002

f: .0485

all my values are in m, and i keep getting .0016411 and its not working no matter how i enter it. SOMEONE PLZ PUT ME OUTTA MY MISERY!!

PHygirl
Guest

## Re: error of f

Use the error of (1/f) in the prelab and multiply that by f^2
error of f = sqrt(((.002/.061)*(1/.061))^2+((.002/.239)*(1/.239))^2)*.0485^2
error of f = .001267

_guest
Guest

Guest123
Guest

## re: errors of the magnification

error =SQRT((deltah_o/h_o)^2+(deltah_i/h_i)^2)*magnification calculated
make sure you put your error in as a positive value

_guest
Guest

## Re: Lab 8 Execution

what do you have to put in the question where they ask you to say if your number is consistent or not? I'm using yes, no, consistent, etc, and they're all not working. help would be appreciated.

jimmy
Guest