Interference Multiple Choice Questions with Answers – PDF Download

MCQ 1: For destructive interference, the path difference is:

1. odd number of half wavelengths
2. even number of half wavelengths
3. whole number of wavelengths
4. even whole number of wavelengths

MCQ 2: Constructive interference happens when two waves are:

1. out of phase
2. zero amplitude
3. in phase
4. in front

MCQ 3: Two waves with phase difference 180° have resultant of amplitude:

1. one
2. zero
3. same as the single wave
4. doubles the single wave

MCQ 4: If two waves are in phase and have same amplitude then resultant wave has:

1. half of amplitude of single wave
2. same amplitude as single wave
3. twice of amplitude of single wave
4. thrice of amplitude of single wave

MCQ 5: Extra distance travelled by one of waves compared with other is called:

1. path
2. displacement
3. phase difference
4. path difference