Physics: Post your doubts here!

[DeViL gURl B)]

Hmm..! Yo Just have to Know when Light Entering Increases i.e Slit width Increases.. This Causes Brighter Fringes to Become Brighter..!
Baqi U need to Know the Equation Lambda=a*x/D! Now when ever they Change Something for E.g change a then rearrange the Equation To make A subject! Then u can use Propationality To see wht happen to Rest of the Thins..! Bas its simple!
This is What i Do !

Thanks a lot!
Second method even I do that .. And what is the link with the intensity ? As in when u inc the intensity then what happens?
Btw thanks again

 

[DeViL gURl B)]

ok ok. I know In Phase and out of phase wali kahaaani

btw can u find anywhere (notes,factsheet) from where i can learn the effects of changing slitseperation,width,a,Wavelength etc in double slit and diffraction grating.
I expect it a lot in the coming paper. worth 4 marks .

Exactly my doubt as well ..

 

[Suchal Riaz]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s13_qp_21.pdf
Q3bii
i found v using v^2=u^2 +2as and then found the k.e using 1/2 mv^2 it was the same answer as ms but not the way would i get all the marks?

yes you will get all the marks if your method is correct. examiner on physics don't tell all the methods like examiner fo M1 papers. but your method just gives the correct answer by chance.

change in K = g.p.e + W.D againt air resistance
w.d against air resistance = asnwer to first part - mgh
maybe they way you did is wrong but the correct asnwer is a coincidence

 

[robinhoodmustafa]

Could Plz Draw THE ans On the Wave and Post it! If u Have time PLzzz !

Amplitude and frequency same. Just the same wave start from 0.5

 

[Mohammed salik]

You'r Welcome the Number of times u Said Thanks !
Same thing Light intensity causes Bright To Become Brighter..!

Thanks a lot!
Second method even I do that .. And what is the link with the intensity ? As in when u inc the intensity then what happens?
Btw thanks again

 

[robinhoodmustafa]

Exactly my doubt as well ..

I found helpful points in David Sang Book. page 222

 

[robinhoodmustafa]

Guys .. What do u mean by lamp shortening? Or lamp shortened? :$

Just like in a Bulb when a tungsten coil is been rolled in a circle so that it takes maximum Surface area and can fit inside the bulb.
PS: just observe the inside of a bulb

 

[omaaaar]

I found helpful points in David Sang Book. page 222

I don't have that book could you take a pic and attach it over here or inbox me
Sorry if I am asking you a bit too much

 

[DeViL gURl B)]

I found helpful points in David Sang Book. page 222

We'll I don't have the book.. So could u please share a screen shot ..
Sorry if I'm bothering u a lot!

 

[Mohammed salik]

We'll I don't have the book.. So could u please share a screen shot ..
Sorry if I'm bothering u a lot!

Oh.. U serious?
Where did u Study ur As-level Course from?

 

[ZaqZainab]

yes you will get all the marks if your method is correct. examiner on physics don't tell all the methods like examiner fo M1 papers. but your method just gives the correct answer by chance.

change in K = g.p.e + W.D againt air resistance
w.d against air resistance = asnwer to first part - mgh
maybe they way you did is wrong but the correct asnwer is a coincidence

Thanks My way was a different one how do i know my way is wrong

 

[omaaaar]

I too don't have that book I studied from a cie endorsed book by Chris mee ,mike crundell,Brian Arnold and Wendy brown

 

[mehria]

Thanks a lot!
Second method even I do that .. And what is the link with the intensity ? As in when u inc the intensity then what happens?
Btw thanks again

when amplitude is doubled then intensity increases 4 times... n when the distance frm the source is doubled then intensity decreases by 4 times...
because intensity is directly proportional to (amplitude)^2 and it is inversely proportional to (1/distance frm the source)^2

 

[robinhoodmustafa]

We'll I don't have the book.. So could u please share a screen shot ..
Sorry if I'm bothering u a lot!

I don't have that book could you take a pic and attach it over here or inbox me
Sorry if I am asking you a bit too much

I cant right now. But please send me a Pm so I could send u later this night,but Dw i will do send it

 

[Mohammed salik]

when amplitude is doubled then intensity increases 4 times... n when the distance frm the source is doubled then intensity decreases by 4 times...
because intensity is directly proportional to (amplitude)^2 and it is inversely proportional to (1/distance frm the source)^2

Wah Wah..!
Scientific Method !

 

[Mohammed salik]

Thanks My way was a different one how do i know my way is wrong

IF u end up with Same Ans..! That means Ur Way is Correct No need to Worry!
In Mark Schemes They write the Easiest Way !

 

[mehria]

Wah Wah..!
Scientific Method !

physics is a part of science..to scientifically hi questions solve krna hai na...

 

[DeViL gURl B)]

Oh.. U serious?
Where did u Study ur As-level Course from?

Ohhh .. Ummm ... Well sorry I do have the book just didn't know the guys name..
Thank u!

 

[Mohammed salik]

physics is a part of science..to scientifically hi questions solve krna hai na...

G Bilkul Theek

 

[DeViL gURl B)]

O

I cant right now. But please send me a Pm so I could send u later this night,but Dw i will do send it

okii thank u