Circular Diffraction Patterns: What is the Correct Diameter of the Slit?

[Brown Arrow]

Circular Diffraction Patterns HELP!

Homework Statement

Homework Equations

theata_1=1.22(lambda)(L)/D L distance from screen, D diameter of slit

w=2.44(lambda)(L)/D

The Attempt at a Solution

so this is what i did not sure where i went wrong maybe at rounding off...

w=2.44(lambda)(L)/D

(10.3/1000)=92.44)(633*10^(-9))(0.8)/D

solving for D i got the diameter to be the following

D=0.119962...mm

i rounded off to three significant figure

D=0.120mm is this correct b/c when i did this i got it wrong, could some one tell me where i went wrong this.

 

[Doc Al]

D=0.120mm is this correct b/c when i did this i got it wrong, could some one tell me where i went wrong this.

I agree with your answer.

 

[Brown Arrow]

ok ill try it again and see if it works

 

[Ush]

before you try it a again, there's an option to check what you put as your last answer, ^ might want to check that first before using an attempt

 

[Brown Arrow]

it worked, before i messed up the decimal place, now correct,

Thanks for helping Doc Al
Brown arrow.