• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

To find the separation of a pair of double slits using youngs experiment.

Extracts from this document...

Introduction

BACKGROUND INFORMATION:

Youngs experiment involved sunlight being allowed to pass through a pinhole, S and then at a considerable distance away , through pinholes S1 and S2. The two sets of spherical waves emerging from the two holes interfered with each otherinsuch a way as to form a symmetrical pattern of varying intensity on the screen AC. This experiment is shown below

 The mathematical formula that was derived from this experiment is Λ = (a * y)/D, which can be re- arranged so that the seperation of the two slits is the subject of the equation,

 a = (λ * D)/y

EQUIPMENT:

  • Monochromatic light (red laser)
  • Measuring tape
  • Double slit
  • Piece of paper
  • Pen

PROCEDURE:

...read more.

Middle

Substitute D, y, and λ = 660nm into the formula, a = (λ * D)/y to obtain a value for the seperation of the double slits, a.

APPLICATION OF ERRORS:

  • The measurement of D will not be completely accurate, due to human inaccuracy, but this will have minimal effect on the eventual out come.
  • The wavelength of the light could possible be inaccurate, this is unavoidable
  • The tracing of the projected dots could be inaccurate due to human error, this could affect the results remarkedly.
...read more.

Conclusion

The values that were obtained for ‘a’ were only a smal percentage off the actual value of ‘a’, which was 5 *10-3m Below is a table that shows the inaccuracy of the two results.

Wavelength, λ

Distance, m

Actual distance

% Inaccuracy

660

4.998-3

5.0-3m

.04%

680

5.15-3m

5.0-3m

3%

From thes results you can deduce that the wavelength of the light is more likely to be closer to 660nm than 680nm, assuming that the results are accurate.

CONCLUSION:

This experiment has been very accurate in finding the seperation of a pair of double slits, using young’s experiment. It was also very usful in providing an insight into the concept of light travelling in waves.

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Waves & Cosmology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Waves & Cosmology essays

  1. Peer reviewed

    Black Holes Research and Report

    4 star(s)

    The particle not absorbed can then be emitted as Hawking Radiation. This currently is only a theory though, and has yet to be proven, but scientists believe there is no reason why it should/could not happen.

  2. In this experiment I aim to find a value for the Young's Modulus of ...

    Gather results into a table so they can be easily compared. 7. From the readings, plot a graph of force x extension. 8. Find the gradient of the graph and use it to find the Young's Modulus for the tape, by using the below formula: - Young's Modulus =

  1. The aim of my coursework is to calculate the wavelength of red laser light ...

    = tan �� Distance between central maximum and 1st order spectrum Distance between grating and wall To use the diffraction grating formula we need to find the spacing between each gap in the grating. d = d x sin ? = x ? Then we use the diffraction grating formula.

  2. Refractive index by tracing light rays

    5. The glass block was removed and the marks were joined to meet CD at Q. The ray PQ in glass was completed and the normal at P was drawn as a dotted line. 6. The angle between PQ and this normal was measured and this is the critical angle (c)

  1. An Experiment To Examine the Effect of Springs In Parallel

    The forces between molecules are electrical because within each molecule are positive and negative charges so therefore forces become attraction and repulsion. I would say that a spring is difficult to pull apart because there are strong attracting forces holding particles together.

  2. Carry out a two source superposition of laser light experiment using a double slit, ...

    = xs where x = fringe separation d s = double slit d = distance between slits and screen ? = 0.005625 x 0.00025 2.075 ? = 0.000000677m = 6.7 x 10( m = 670 x 10( m = 670 nm Conclusion When the laser was turned on it diffracted at the two slits producing two waves.

  1. Study the interference of light using Helium - Neon Diode Laser.

    A bright band of light is thus obtained at X. As A and B are coherent sources, the bright band is permanent. With wave crests and troughs arriving at X at the same time, we say that the bright band is due to constructive interference of the light waves from A and B at X.

  2. I intend to investigate whether any correlation exists between the wavelength of light exerted ...

    Voltages from the solar panel are read in via an analogue pin on the microcontroller. The negative connection from the solar panel is fed to Ground on the Arduino. The Arduino concatenates the time elapsed since the LED was activated with the voltage readout from the solar panel, and this is sent over a USB serial connection to the laptop.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work