Flashcards
Slit Practical Notes
Flashcards do conjunto (8)
- 1How would we measure fringes?Stick sheet of graph paper to the wall and mark the fringes that are shown
Then remove it and take measurements using vernier calliper - 2How could we reduce the uncertainty of fringe spacing measurements?Measure several fringes and divide by the amount of gaps between them (amount of gaps = number of fringes - 1)
- 3How could we get the most accurate value of the distance between the slit and the screen?Use a tape measure
Ensure the distance is ≥ 2m - 4To improve accuracy, the room should be....Dark
- 5To further improve accuracy, we could....Repeat measurements (which reduces the effect of random errors)
- 6What laser safety steps should be followed?Avoid shining laser at / near person
Laser safety goggles
Avoid reflections
Warning sign or light to warn unaware - 7What would the fringes look like if white light was used?-Central fringe is white
-Fringes are wider than for monochromatic
-Other fringes are a spectrum of colours, violet on inside, red on outside of each
-These will overlap with each-other as they are much wider than a monochromatic fringe - 8Define monochromaticA single wavelength or frequency