What happens when a wave strikes a boundary at an angle of 0 degrees?
a) The wave is reflected at the same angle
b) The wave refracts into the boundary
c) The wave passes straight through without change
d) The wave is completely absorbed
What does Snell’s law describe?
a) The relationship between the angle of incidence and the angle of reflection
b) The reflection of waves
c) The relationship between the angles of incidence and refraction
d) The diffraction of waves
When a wave passes from a less dense to a more dense medium, what happens to its speed?
a) The speed increases
b) The speed remains the same
c) The speed decreases
d) The wave is reflected back
What is the angle of incidence?
a) The angle between the wave and the normal line to the surface
b) The angle between the reflected wave and the boundary
c) The angle between the refracted wave and the boundary
d) The angle between the incident wave and the reflected wave
What is refraction?
a) The bending of waves when they pass through a boundary
b) The bouncing of waves off a surface
c) The spreading of waves through an opening
d) The change in wave frequency as it travels
What happens when a wave strikes a boundary at an angle greater than the critical angle?
a) The wave refracts through the boundary
b) The wave is transmitted through the boundary
c) The wave is reflected back into the original medium
d) The wave is absorbed by the boundary
What is the critical angle in refraction?
a) The angle at which the wave passes through the boundary without bending
b) The angle above which total internal reflection occurs
c) The angle of incidence at which the wave refracts at 90 degrees
d) The angle of reflection when waves bounce off a surface
What happens to the wavelength of a wave when it enters a medium with a higher refractive index?
a) The wavelength increases
b) The wavelength decreases
c) The wavelength remains the same
d) The wavelength fluctuates
What is the law of reflection?
a) The angle of incidence is greater than the angle of reflection
b) The angle of incidence is equal to the angle of reflection
c) The angle of reflection is zero
d) The angle of incidence is half of the angle of reflection
Which of the following is an example of refraction?
a) A stick appearing bent when placed in water
b) A shadow cast by an object
c) A wave bouncing off a mirror
d) A sound wave passing through a door
Which of the following describes the behavior of light waves when they pass from air to water?
a) The light slows down and bends toward the normal
b) The light speeds up and bends away from the normal
c) The light does not bend
d) The light is completely reflected back into the air
When a wave is reflected, what happens to its speed?
a) The speed increases
b) The speed decreases
c) The speed remains unchanged
d) The wave is stopped
What does the refractive index of a medium tell us?
a) The speed of light in that medium compared to the speed of light in a vacuum
b) The color of light in that medium
c) The amplitude of waves passing through the medium
d) The wavelength of sound in that medium
Which of the following causes the bending of waves in refraction?
a) A change in the frequency of the wave
b) A change in the speed of the wave as it passes into a new medium
c) A change in the amplitude of the wave
d) A change in the direction of the wave’s path
What happens when a light wave strikes a reflective surface at an angle of incidence of 90 degrees?
a) The light is refracted through the surface
b) The light is reflected back at the same angle
c) The light passes through without change
d) The light is absorbed by the surface
What is the refractive index of a medium in which the speed of light is 2.5 × 10^8 m/s (the speed of light in a vacuum is 3 × 10^8 m/s)?
a) 0.83
b) 1.2
c) 1.33
d) 1.2
What is the effect of a higher refractive index on the bending of light?
a) The light bends more towards the normal
b) The light bends away from the normal
c) The light continues without bending
d) The light speeds up
What phenomenon occurs when a wave strikes a boundary and reflects in such a way that it returns to the same medium?
a) Refraction
b) Diffraction
c) Reflection
d) Transmission
What happens to the angle of refraction if the angle of incidence increases?
a) The angle of refraction stays the same
b) The angle of refraction decreases
c) The angle of refraction increases
d) There is no refraction
What does the term “normal” refer to in the context of reflection and refraction?
a) The surface where the wave is incident
b) A line perpendicular to the surface at the point of incidence
c) The point where the wave bends
d) A wave’s point of maximum displacement
In the case of total internal reflection, which of the following is true?
a) The wave passes through the boundary into the second medium
b) The wave is refracted but at a smaller angle
c) The wave is entirely reflected back into the first medium
d) The wave is absorbed by the second medium
What is the relationship between the angle of incidence and the angle of reflection?
a) The angle of incidence is always greater than the angle of reflection
b) The angle of reflection is half of the angle of incidence
c) The angle of incidence is equal to the angle of reflection
d) The angle of incidence has no relation to the angle of reflection
What happens when light passes from a denser to a less dense medium?
a) The light bends away from the normal
b) The light bends towards the normal
c) The light continues straight
d) The light is reflected back
What is a refractive index of a vacuum?
a) 1
b) 0
c) 1.5
d) 2
What happens to the direction of a light wave when it refracts?
a) It changes direction depending on the speed of the medium
b) It always continues in the same direction
c) It bends at a fixed angle
d) It is completely reflected at the boundary
Which phenomenon involves both reflection and refraction?
a) Diffraction
b) Total internal reflection
c) Interference
d) Polarization
What happens to the angle of refraction when a wave enters a medium with a higher refractive index?
a) The angle of refraction increases
b) The angle of refraction decreases
c) The angle of refraction remains unchanged
d) The wave is absorbed
