What is Snell’s Law?
a) The law that explains the reflection of light
b) The law that describes the refraction of light
c) The law that describes the diffraction of light
d) The law that explains the dispersion of light
What happens to light when it passes from a denser medium to a rarer medium?
a) It bends towards the normal
b) It bends away from the normal
c) It travels in a straight line
d) It is absorbed by the second medium
If light travels from air (refractive index = 1) into water (refractive index = 1.33), which direction does the light bend?
a) Toward the normal
b) Away from the normal
c) It continues straight
d) It refracts at a 90° angle
Snell’s Law relates the angles of incidence and refraction to which property of the media?
a) Refractive index
b) Absorption coefficient
c) Density
d) Reflective index
What is the formula for Snell’s Law?
a) n₁sinθ₁ = n₂sinθ₂
b) n₁tanθ₁ = n₂tanθ₂
c) n₁cosθ₁ = n₂cosθ₂
d) n₁θ₁ = n₂θ₂
If the angle of incidence is 0°, what happens to the angle of refraction?
a) It becomes 90°
b) It is also 0°
c) It becomes 45°
d) It becomes 180°
When light moves from water to air, it bends in which direction?
a) Toward the normal
b) Away from the normal
c) At an angle of 90°
d) It remains unaffected
What does Snell’s Law help to determine?
a) The speed of light
b) The angle of incidence in a mirror
c) The angle of refraction as light passes through different media
d) The frequency of light waves
What happens to the light ray when the angle of incidence is equal to the critical angle in Snell’s Law?
a) The ray bends parallel to the surface
b) The ray refracts at 90° to the normal
c) The ray continues straight through
d) The ray bends back into the first medium
What occurs if the angle of incidence is greater than the critical angle?
a) The light is refracted into the second medium
b) Total internal reflection occurs
c) The light is absorbed by the second medium
d) The light slows down
What is the refractive index of a medium?
a) The ratio of the speed of light in a vacuum to the speed of light in the medium
b) The ratio of the angle of incidence to the angle of refraction
c) The speed of sound in the medium
d) The speed of light in the medium
Which of the following is an example of refraction?
a) The bending of light when it hits a mirror
b) The change in direction of light as it passes through water
c) The bending of light through a small hole
d) The splitting of light into a spectrum
When light travels from a less dense to a denser medium, what happens to its speed?
a) It increases
b) It decreases
c) It remains constant
d) It fluctuates
Which of the following does Snell’s Law describe?
a) Reflection of light
b) Diffraction of light
c) Refraction of light
d) Polarization of light
What is the critical angle of refraction?
a) The angle at which the refracted ray is at 90° to the normal
b) The angle where total internal reflection begins
c) The angle at which light is completely refracted into the second medium
d) The angle where the incident ray is perpendicular to the surface
If the refractive index of medium 1 is 1.5 and that of medium 2 is 1.0, what is the angle of refraction if the angle of incidence is 30°?
a) 19.47°
b) 41.8°
c) 22.1°
d) 24.5°
What happens when light passes from air into a glass prism?
a) The light bends away from the normal
b) The light bends towards the normal
c) The light speed increases
d) The light speed decreases
Which medium has the highest refractive index?
a) Air
b) Water
c) Glass
d) Diamond
If the angle of incidence is 0° (light hits the surface head-on), what will be the angle of refraction according to Snell’s Law?
a) 0°
b) 90°
c) 45°
d) 60°
Which phenomenon does Snell’s Law help explain in the context of a rainbow?
a) Reflection
b) Dispersion
c) Diffraction
d) Polarization
What is the effect of increasing the refractive index of the second medium in Snell’s Law?
a) The angle of refraction decreases
b) The angle of refraction increases
c) The angle of incidence decreases
d) The angle of incidence increases
If the angle of incidence is 60° and the refractive index of the first medium is 1.5, what is the angle of refraction in the second medium (refractive index = 1.0)?
a) 39.8°
b) 45.6°
c) 30.0°
d) 25.3°
Which of the following is the critical angle for light passing from water (refractive index = 1.33) into air (refractive index = 1)?
a) 48.6°
b) 41.8°
c) 53.1°
d) 54.6°
Which property of light is responsible for the bending of light when it passes from one medium to another?
a) Reflection
b) Refraction
c) Diffraction
d) Absorption
What is the speed of light in a medium with a refractive index of 2?
a) The same as the speed of light in a vacuum
b) Half the speed of light in a vacuum
c) Twice the speed of light in a vacuum
d) Unchanged
