Vocabulary
How many complete waves pass a point each second?
Frequency
What do waves transfer without requiring the material to travel along with the wave?
Energy
What relationship connects wave speed, frequency, and wavelength?
v = fλ
According to the law of reflection, how does the angle of incidence compare to the angle of reflection?
They are equal
What can happen when sound reflects from a surface?
An echo
What do we call the distance between two consecutive matching points on a wave?
Wavelength
What type of wave has a disturbance perpendicular to the direction the wave travels?
A transverse wave
At constant wave speed, what happens to wavelength when frequency increases?
It decreases
From what is the angle of incidence measured, and from what is the angle of reflection measured?
The normal line
What kind of reflection occurs when a smooth surface sends reflected rays in an orderly direction?
Regular reflection
What do we call the maximum displacement of a wave from its resting position?
Amplitude
Which wave property is related to the energy carried by a wave?
Amplitude
A wave travels at 12 m/s with a frequency of 4 Hz. What is its wavelength?
3 m
A ray strikes a mirror at 40° from the normal. What is its angle of reflection?
40°
What kind of reflection occurs when a rough surface scatters rays in different directions?
Diffuse reflection
What do we call the incoming ray that strikes a surface?
The incident ray
In a transverse wave, how does the direction of the disturbance compare to the direction of wave travel?
It is perpendicular
In the same medium under the same conditions, what kind of relationship do frequency and wavelength have?
An inverse relationship
What do we call the angle between the reflected ray and the normal?
The angle of reflection
Why can you see a book that does not produce its own light?
Light reflects from the book and enters your eyes
What do we call the line perpendicular to the surface where a ray strikes?
The normal line
Two waves travel through the same medium. Wave B has a greater amplitude than Wave A. Which wave carries more energy?
Wave B
A wave’s frequency increases while its speed remains constant. Which property decreases, making the waves closer together?
Wavelength
A ray’s angle of incidence is 30° from the normal. What is the reflected ray’s angle from the normal?
30°
A rough wall scatters reflected light in different directions. What rule still applies to each individual ray?
The law of reflection