The video tutorial covers the concepts of reflection and refraction. It begins with an explanation of reflection, emphasizing the equality of incident and reflected angles measured from the normal. The tutorial then delves into refraction, describing how light bends when it passes through different media due to changes in speed. Snell's Law is introduced to quantify this behavior, and examples are provided to illustrate the concepts. The video also explains the critical angle and total internal reflection, highlighting scenarios where light reflects entirely within a medium. Finally, an example is given to demonstrate how wavelength changes with refraction.

What is the basic rule of reflection?

• The angle of incidence is equal to the angle of reflection.

• The angle of incidence is greater than the angle of reflection.

• The angle of incidence is less than the angle of reflection.

• The angle of incidence is unrelated to the angle of reflection.

From where are the angles in reflection defined?

• From the light source

• From the normal

• From the surface

• From the observer

What happens to light during refraction?

• It bends

• It changes color

• It reflects

• It disappears

What remains constant when light refracts?

• Speed

• Wavelength

• Frequency

• Angle

Tags

NGSS.HS-PS4-1

What is the term for the measure of optical density?

• Refractive index

• Reflective index

• Optical index

• Density index

What does Snell's Law relate?

• Angles of incidence and reflection

• Angles of incidence and refraction

• Wavelengths in different media

• Speed of light in different media

What happens to the angle of refraction when light moves from a medium with a lower refractive index to a higher one?

• It decreases

• It becomes zero

• It remains the same

• It increases

What is the critical angle?

• The angle at which the refracted angle is 90 degrees

• The angle at which light stops bending

• The angle at which light refracts completely

• The angle at which light reflects completely

What is total internal reflection?

• When light is completely absorbed

• When light is completely reflected within a medium

• When light passes through a medium without bending

• When light changes color within a medium

Tags

NGSS.HS-PS4-5

What happens to the wavelength of light when it moves from water to air?

• It becomes zero

• It decreases

• It increases

• It remains the same

Tags

NGSS.HS-PS4-1