Physics 53

[Mattman]

How was it guys?? Anyone want to compare answers pm me

 

[randomkidkid]

it was a pain with all the calculations for question 2 but quite doable, how did you find it

 

[XPFMember]

AsSalamoAlaikum Wr Wb,

REMINDER: No paper discussion within 24 hours of the exam.

 

[randomkidkid]

what was everyone's last v value? with error

 

[dadufahad]

it was pretty good..i completed the first qs early and thus i had a lot of time for the second qs..

 

[jasters]

i got .54 +-.09
i got the error as 24%
the gradient ws like .864+-.17 ish
my biggest error in the table was like +-.15 and the rest were lower
and my k value was like 21.4 or sumfin like that,
people gott around those values, it was really easy to make mistakes in that second bit
the graph passed really close to the origin

since its been more than 24 hours,for the question
depen:theta
idepen:wavelen
then distance to lamp and observer would be constant
also the intensity of the lamp would be constant
then i used the equation theta=kl
thus a relation would be a straight line through origin
then i said fix a protractor to the table at the point of the observer
then also you diff wavlen you could change the colour of the bulbs to diff colours
use the same observer each time
repeat multiple times and take an average for theta
then safty precautions were the bulb could be hot
also the bright light could cause eye damage, so wear glasses
preform the experiment in dark room
bulbs on a track so you can move then closer to eachother
move bulbs closer by the same distance, first by larger amounts then smaller value for a accurate result
also to check that the bulbs are the same power by measuring the p.d across them using a volt meter
also side walls to block light and direct observers eyes only to the two bulbs

 

[jasters]

does anyone else want to say what they got

 

[Mattman]

Can i say that to Not use lamps with overly high power to reduce intensity, so eyes will be not damaged

 

[jasters]

well i was thinking that but then i though it would reduce the ease at wich the overlap may form,what were your answers? for the seccond

 

[Mattman]

well i was thinking that but then i though it would reduce the ease at wich the overlap may form,what were your answers? for the seccond

All my answers are abt the same as urs

 

[jasters]

yeah, i wonder if that wasa hard or easy exam, some people stuffed it up quite bad

 

[Mattman]

yeah, i wonder if that wasa hard or easy exam, some people stuffed it up quite bad

No doubt ppl will forgot to square v

 

[Mattman]

Um for the 1st question I didn't use a protractor, but I use tan theta formula to find the angle, can?

 

[jasters]

ohh yeah, if you did that then it stuffs up the rest of your answers, what did you put downfor question 1?,or did you put anything i never said

 

[jasters]

Um for the 1st question I didn't use a protractor, but I use tan theta formula to find the angle, can?

yeah why not, i just wrote fixed protractor on the diagram so yeah

 

[Mattman]

ohh yeah, if you did that then it stuffs up the rest of your answers, what did you put downfor question 1?,or did you put anything i never said

I used theta=klambda instead, and I didn't write as many extra details other than that it's the same

I wrote down that ur eyes must be at the same level as the lamp, constant variable, and u use a table for it

 

[jasters]

but i also used theta =klambda

 

[jasters]

ohhh oops i wrote l for lambda before

 

[Mattman]

but i also used theta =klambda

Oh that's fine then I thought u meant the l as smthng else

 

[jasters]

well at least its over, my last cie exam is tmr! yeahhhhyy