0
Upcoming SlideShare
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Standard text messaging rates apply

# 6.4 Radiation and waves

376

Published on

0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
Your message goes here
• Be the first to comment

• Be the first to like this

Views
Total Views
376
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
2
0
Likes
0
Embeds 0
No embeds

No notes for slide

### Transcript

• 1. 17 October 2010
6.4 Radiation and waves
• 2.
• 3. Aims
Show that light can be reflected, refracted, diffracted and produces interference effects
Explain that we think sound is a wave
Show that light can be reflected and refracted
• 4. Light
When light interacts with an object it can be either reflected (bounce off), transmitted (go through) or be absorbed (transfer energy)
• 5. Reflection
Absorption
Transmission
• 6. I think a light ray is a stream of tiny particles emitted by a source
My experiment show that light rays can interfere. Two streams of particles could not do this. Light is a wave.
• 7. Reflection
Refraction
Reflection is the change in direction of a wavefront at an interface
Refraction is the change in direction of a wave due to a change in its speed.
Diffraction
Interference
Interference is the addition of two or morewaves that results in a new wave pattern.
Diffraction is the apparent bending of waves around small obstacles and the spreading out of waves past small openings.
• 8.
• 9.
• 10.
• 11.
• 12. Demonstrations
Does sound behave like a wave?
• 13. Quantum weirdness
• 14. Reproducing Young’s double slit experiment
We are going to repeat Young’s experiment and derive a value for the wavelength of the laser light and compare with the printed value
You first need to make your ‘double slit’
• 15. What will happen?
Sketch what you see with no card
Sketch what you think you will see with the card
Sketch what you actually see
Why do you think this happens?
• 16.
• 17. What is the medium?