Answer :
The phenomenon described in your question where the waves created by two speed boats in a lake interact to form larger waves is an example of constructive interference. Thus, the correct choice is A. constructive interference.
Here's a detailed explanation:
What is interference?
- Interference occurs when two or more waves overlap in space, and their effects combine. This can happen with any types of waves, including sound waves, light waves, and water waves.
Types of interference:
- Constructive interference happens when the crests of one wave line up with the crests of another wave, combining to create a wave with a larger amplitude. This results in larger waves being formed.
- Destructive interference is when the crest of one wave aligns with the trough of another, which can lead to a reduction or cancellation of the wave's overall amplitude.
Application to speed boats:
- When two speed boats move in a lake, they generate waves on the water's surface. If these waves align in such a way that their crests match up, constructive interference occurs, leading to the creation of larger waves.
Why not other options?
- Destructive interference (B) would result in smaller or reduced waves, not larger ones.
- Absorption (C) involves the wave energy being absorbed and not necessarily creating larger waves.
- Transmission (D) refers to waves passing through a medium or from one medium to another, not to increasing the size of waves through interaction.
Understanding the ways in which waves interact helps explain various phenomena, from ocean patterns to how sound travels in different environments.
