Procedure for the experiment is as follows:

• step1: Read the theory

• step2: Set some value for D (distance from slits to the screen).

• step3: set value for d(distance between the slits).

• step4: set value for 𝛽(Fringe width)

• Study the graph in order to understand fringe width which is given by -

• 
  




Perform the following experiment

Experiment:

Aim:- Perform the following experiment to verfiy the wavelength(λ_t) of the given monochromatic source and To find out the percentage error .

1. Set some value for D (distance from slits to the screen).

2. set value of d (distance between the slits ).

3. Calcualte the value of fringe width (𝛽).

4. Repeat the experiemnt 5-6 times and each time calculate the corrosponding value of λ_c.

5. Obtain the calculated value λ_c by calculating mean.

6. Verify the values of calculated λ_c and given λ_t and thereby calculate percentage error.

7. Where :- λ_c is calculated value of lambda.
   λ_t is theoritical value of lambda.

S.no	D(distance from slits to screen)	d (distance between slits)	𝛽(fringe width)	λc (wavelength)
1.
2.
3.
4.
5.

• Value of λ_t taken :____________

• The mean value of λ_c: _________




• Result:

• λ_c is = ________________ and Percentage error =______________