Summary
summary of Wave Properies
- Module
- Waves (PHYA2)
- Institution
- AQA
this is a brief document aimed at being a good review of waves properties. includes diagrams ;-) and flash cards
[Show more]
Seller
Follow
Available practice questions
Flashcards
10 Flashcards
£2.99
1 sales
Some examples from this set of practice questions
1.
What is Constructive interference?
Answer: The waves are lined up so that their crests add together, and the troughs add together. The result is waves twice as big.
2.
what is Destructive interference?
Answer: The waves are mis aligned so that the crest of one is cancelling the trough of the other. The result is no waves at all.
3.
what is Coherence?
Answer: when two sources of waves emit waves that have a constant phase difference
4.
what is Diffraction?
Answer: when a wave passes through a gap or around an obstacle, it spreads out. Small gaps and long waves provide the greatest diffraction
5.
what is Refraction?
Answer: if waves go through a boundary then their speed changes then their speed also changes.
Content preview
Physics WavesWave properties
- Transfer energy
- Reflect
o For a plane surface (a mirror) then the angle is always the same as the angle of
incidence. Normal is perpendicular to the reflective surface
- Refract
o If waves go through a boundary and their speed changes then their wavelength
also changes. If they are incident at a no 0 angle to the boundary then they will
change direction.
- Diffract
o Waves that pass through a gap or around an obstacle will spread out.
Small gaps and long waves will cause the greatest diffraction.
Diffraction and satellite dish design
- satellite dishes are designed to reflect waves to a
focal point. A larger dish can collect more waves and hence
more powerful signals. The extra size creates less diffraction so
that the focal area will be smaller. This means that the larger dish
must be more carefully aligned to its source.
Waves refract towards the normal as they slow down. This occurs
with more optically dense materials such as dense materials or
shallow water.
Super Position
Constructive interference:
- The waves are lined up so that their crests add together, and the troughs add together.
The result is waves twice as big.
Destructive interference:
- The waves are mis aligned so that the crest of one is cancelling the trough of
the other. The result is no waves at all.
When two or more waves meet at a point, the resultant displacement is the algebraic sum
of the displacements of the individual waves.
………………………………………………………………………………………….
Coherence
Two sources of waves are coherent when they emit
waves that have a constant phase difference
only if the waves have the same frequency or wavelength.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller benmontanjees. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
55628 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now