Topic 4: Waves Flashcards
1
Q
Outline what is meant by the principle of superposition of waves.
A
When two waves meet, the resultant displacement is the vector sum of their individual displacements.
2
Q
Describe the appearance of the new pattern formed when one of the slits in a double-slit diffraction are covered.
A
- Less intense as less light passing through
- Bright central maxima
- Subsidiary maxima on either side
3
Q
Explain the formation of intensity minima.
A
- the minima are formed by destructive interference
- when waves are π out of phase
4
Q
REFRACTION AND REFLECTION
A
5
Q
What is the phase change if first refractive index > second refractive index?
A
π
6
Q
What is the Rayleigh criterion for resolution?
A
The central maximum of one diffraction pattern lies over the first minimum of the other diffraction pattern.
7
Q
OUtline how a standing wave is formed
A
