12.1

Question 1

What is the principle of superposition of waves

Answer 1

• When two similar types of waves meet at a point, the resultant displacement at that point is equal to the vector sum of the individual displacements of the waves

Question 2

What does superpose mean

Answer 2

When two waves overlap

Question 3

What is constructive interference

Answer 3

When two waves are in phase then the max positive displacement creates a resultant displacement w/ greater amplitude

Question 4

Why does constructive interference cause a brighter light / louder sound

Answer 4

Intensity = amplitude^2

Question 5

What is destructive interference

Answer 5

• Superposition of two waves in antiphase so that the waves cancel each other out and the resultant wave has smaller amplitude than the original waves

Question 6

What is interference

Answer 6

• Superposition of two progressive waves from coherent sources to produce a resultant wave
• Resultant wave has displacement equal to sum of individual displacements from the waves
• Interference is the effect/pattern that is observed upon wave superposition

Question 7

What are coherent wave sources

Answer 7

• Coherent wave sources are those that maintain a constant phase difference at a given point, throughout time
• Coherent wave sources are those that have the same frequency