True or False

1. The frequency of the wave can be changed by changing the frequency at which the waves are generated

2. Two crests are out of phase with each other. A crest and a trough are in phase with eachother

3. When a wave reaches the boundary of a new medium, part of the wave can be reflected and part of the wave can be transmitted into the new medium

My work
I think
1. False
2. Flase
3. True

1. sure, whistle different notes.

2. I agree false.

3. I agree true.

So for 1. Am i right is it false?

I think 1 is true. I can change the frequency of the sound waves from my lips by changing the frequency I generate them at. In fact the wave frequency is the generator frequency.

1. True: The frequency of the wave can be changed by changing the frequency at which the waves are generated. Frequency refers to the number of complete cycles of the wave that occur in a given time period. By changing the rate at which the waves are generated, you can change the frequency of the wave.

To confirm the answer, you can observe examples of waves in different scenarios, such as sound waves or electromagnetic waves, and notice how changing the frequency of the source affects the frequency of the waves.

2. False: Two crests of a wave are always in phase with each other. In phase means that the peaks of the waves align perfectly. Conversely, a crest and a trough are out of phase because they are at opposite points of the wave cycle.

To verify this, you can visualize a wave and observe the alignment of its crests and troughs. You can also consider the mathematical representation of waves and notice that crests occur at the same point in time.

3. True: When a wave reaches the boundary of a new medium, part of the wave can be reflected and part can be transmitted into the new medium. This behavior is known as wave reflection and transmission.

To verify this, you can investigate examples of waves encountering different mediums, such as light waves passing from air to water or sound waves encountering a solid barrier. By observing the behavior of the waves at the boundary, you will notice both reflection and transmission of the wave.

Good job on your answers! Remember, it's always important to validate your answers by considering the principles and observations related to the topic.