unit 3 phy help(6ph07)

[Hamzeh S]

My Teachers Expected the graph question to be about the threshold frequency and planck's constant idk about the experiment

 

[svenas]

My Teachers Expected the graph question to be about the threshold frequency and planck's constant idk about the experiment

what is threshold frequency lol?

 

[Missyyy]

I dont know how to read the readings on these devices lol
Like the one in May 2010 Q1

 

[svenas]

is there difference if i say : metre rule measure to nearest 0.5 mm or if i say has a precision of 0.5 mm??????????? any diff or means the same?

 

[JustAnotherPerson22]

is there difference if i say : metre rule measure to nearest 0.5 mm or if i say has a precision of 0.5 mm??????????? any diff or means the same?

you say it measures up to 1mm accuracy with uncertanity of 0.5mm

 

[JustAnotherPerson22]

btw guys what's the gradient of a length against force graph
length--y axis
force--x axis

 

[JustAnotherPerson22]

what is threshold frequency lol?

the minimum amount of frequency needed to cause electrons to "escape" as photoelectrons

 

[svenas]

the minimum amount of frequency needed to cause electrons to "escape" as photoelectrons

whicj experiment u thnk will cme?
and plz check for me this one : shud i say he chose it cauz it has a precision of 0.5mm ...
and a metre rule has a precision of 0.5 mm ...and it can measure to 0.1 mm accuracy ..isnt it? it can measure the least value i.e 0.1mm..
If u thnk am wrong plz explain to me accuracy and precision exactly..plz i l be so thankful...i always face the problems here ..in this easy thing...

 

[bilquees]

There is an experiment in teachers practical book about polarization of light,if someone can post it here plz?

 

[JustAnotherPerson22]

whicj experiment u thnk will cme?
and plz check for me this one : shud i say he chose it cauz it has a precision of 0.5mm ...
and a metre rule has a precision of 0.5 mm ...and it can measure to 0.1 mm accuracy ..isnt it? it can measure the least value i.e 0.1mm..
If u thnk am wrong plz explain to me accuracy and precision exactly..plz i l be so thankful...i always face the problems here ..in this easy thing...

what you said is correct, the least value that can be measured is 0.1mm

 

[JustAnotherPerson22]

There is an experiment in teachers practical book about polarization of light,if someone can post it here plz?

that's more of a unit 2 experiment

 

[bilquees]

whicj experiment u thnk will cme?
and plz check for me this one : shud i say he chose it cauz it has a precision of 0.5mm ...
and a metre rule has a precision of 0.5 mm ...and it can measure to 0.1 mm accuracy ..isnt it? it can measure the least value i.e 0.1mm..
If u thnk am wrong plz explain to me accuracy and precision exactly..plz i l be so thankful...i always face the problems here ..in this easy thing...

meter rule has precision of 1 mm.

 

[svenas]

what you said is correct, the least value that can be measured is 0.1mm

so a "a precision of 0.5 mm" mean what exactly?

 

[JustAnotherPerson22]

I'll give you the answer simply put
The meter rule can measure up to 0.1mm accuracy
the uncertainty of the ruler is +-0.05mm

 

[svenas]

I'll give you the answer simply put
The meter rule can measure up to 0.1mm accuracy
the uncertainty of the ruler is +-0.05mm

yea thx and what abt 0.5 mm?

 

[JustAnotherPerson22]

yea thx and what abt 0.5 mm?

to find the uncertanity of a material, you take the lowest value and divide it by 2
so for the ruler 0.1m is the lowest you can go
0.1/2=0.05m

 

[bilquees]

so a "a precision of 0.5 mm" mean what exactly?

I think that is uncertainity of meter rule.

 

[alex]

I'll give you the answer simply put
The meter rule can measure up to 0.1mm accuracy
the uncertainty of the ruler is +-0.05mm

0.05mm is too precise for a rule

 

[svenas]

0.05mm is too precise for a rule

what does precision actually means? no of sf it can measure to or the least measuremnt the device can measure?

 

[Missyyy]

Has anyone written down the Polarisation of light experiment? Its on Page 101 in the textbook.