Ideal Solutions

[geoff_821]

Hey, just wondering if anyone has an 'ideal' solution regarding the Young's double slits experiment.
Here's the question:
"At the time of Young's double slit experiment there were two competitng models of the nature of light. Explain how Young's experiment supported one of these models compared with the other" - 3 marks
My solution:
-Young's experiment supported the wave model of light.
- When passing light through two slit, a pattern of bright and dark bands appeared on the screen. This demonstrates that light had diffracted when passing through the slits, causing it to interfere with itself. This interference pattern demonstrates that light carries wave characteristics.
- If light were treated as a particle, only two bright bands would appear on the screen. However this was not the case, therefore Young's experiment does not support the particle model.

So it's 3 marks, I'm assuming the marks are allocated for: Identifying supported model, Explaining how experiment supports model, explaining why the other model is not supported.

Here's another question, however I don't know how to explain it properly.
"Explain briefly how the results of the photoelectrict effect experiment supported a competing model to the one supported by Youngs experiment" 3 Marks
Would the marks be allocated like the question above? (1 mark for identifying supported model, 1 for explaining why it supports, 1 mark explaining why it doesn't support the other model)

Thankyou

[HarveyD]

yeah that sounds pretty accurate
may also want to mention diffraction being a wave property as well with the ds experiment just to be sure

also are you sure about the "two bright bands" with light being treated as a particle model?
wouldnt it be one large middle band?

[HarveyD]

btw just my guesses
gotta wait till Laserdd confirms

[geoff_821]

yeah that sounds pretty accurate
may also want to mention diffraction being a wave property as well with the ds experiment just to be sure

also are you sure about the "two bright bands" with light being treated as a particle model?
wouldnt it be one large middle band?

Cheers, Well if there were two slits and light was a particle (therefore no diffraction) the light would travel straight through both slits.
Since there's no diffraction, only two bright bands? Well that's how I think of it. Tell me if I'm wrong

[HarveyD]

ah yeah fair enough
was thinking of single slit, my bad

[Shark 774]

yeah that sounds pretty accurate
may also want to mention diffraction being a wave property as well with the ds experiment just to be sure

also are you sure about the "two bright bands" with light being treated as a particle model?
wouldnt it be one large middle band?

Cheers, Well if there were two slits and light was a particle (therefore no diffraction) the light would travel straight through both slits.
Since there's no diffraction, only two bright bands? Well that's how I think of it. Tell me if I'm wrong

Yeah you are right.