Investigation of the interference effects by Young's slit and diffraction by a diffraction grating Flashcards Preview

AS Physics Practical Revision > Investigation of the interference effects by Young's slit and diffraction by a diffraction grating > Flashcards

Flashcards in Investigation of the interference effects by Young's slit and diffraction by a diffraction grating Deck (6)
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1

What precaution must be taken?

optical laser with output of 1mW or less

 

ensure it is not pointed directly into anyones eyes

 

use matt paper

2

What should the conditions be in the lab?

partially darkened

3

How is fringe seperation measured?

mark the visible fringes

 

count the fringes

 

central fringe is not included

 

use reuler to measure D

4

how is slit separation measured?

with Vernier calipers

5

What would the graph show?

w against D

 

should be a straight line through the origin

6

what does the gradient of the graph show?

λ / s