Diffraction and diffraction grating.

Diffraction and diffraction grating.

For better understanding:

•  You have to investigate various sources of information, examples and understanding of the material.
• Also, for better achievements, I offer you to execute WebQuest, which include a full internet resources research on the subject.
• The effects of diffraction are often seen in everyday life.

Your main task is first to review the proposed sites and information.

• Then go and read the questions and find the answers to them using the homepage on the subject.
• Make sure that you do your own job with understanding, rather than mechanical writing.

Try to find answers to the following questions:

1)Where can be used diffraction?

2)What is diffraction grating in optics?

3) For what diffraction grating is useful?

4) How else can we call diffraction grating?

5) Why diffraction arises?

6)What is  Huygens–Fresnel principle?

7) How does diffraction occurs?

8) Does the widths of fringes are equal in diffraction?

Here are the links,

where you can get acquainted with the subject and its presentation:

• http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/grating.html
• https://en.wikipedia.org/wiki/Diffraction_grating
• http://www.s-cool.co.uk/a-level/physics/diffraction/revise-it/diffracti…
• https://en.wikipedia.org/wiki/Diffraction#Diffraction_of_light
• https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=6&cad=r…

ANSWERS:

1)Where can be used diffraction?

• Diffraction can be used to analyse the light from stars, by separating the different wavelength waves that are emitted with a diffraction grating.

2)What is diffraction grating in optics?

• In optics, a diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions.

3) For what diffraction grating is useful?

• The diffraction grating is an immensely useful tool for the separation of the spectral lines associated with atomic transitions. 

4) How else can we call diffraction grating?

• ''Super prism"

5) Why diffraction arises?

•  Diffraction arises because of the way in which waves propagate

6) What is  Huygens–Fresnel principle?

• That is a method of analysis applied to problems of wave propagation both in the far-field limit and in near-field diffraction.
  

7) How does diffraction occurs?

• When the gap size is larger than the wavelength, the wave passes through the gap and does not spread out much on the other side. When the gap size is equal to the wavelength, maximum diffraction occurs and the waves spread out greatly - the wavefronts are almost semicircular.
  

8) Does the widths of fringes are equal in diffraction?

• In diffraction, the widths of fringes are not equal.

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