reflection and refraction

Front

What is the law of reflection?

Back

The law of reflection states that the angle of incidence is equal to the angle of reflection, measured from the normal to the surface.

Tags

NGSS.MS-PS4-2

Front

Define reflection in the context of light.

Back

Reflection is the bouncing back of light rays when they hit a surface that does not absorb the light.

Tags

NGSS.MS-PS4-2

Front

What is the difference between regular and diffuse reflection?

Back

Regular reflection occurs on smooth surfaces, producing clear images, while diffuse reflection occurs on rough surfaces, scattering light in many directions.

Tags

NGSS.MS-PS4-2

Front

What is refraction?

Back

Refraction is the bending of light rays as they pass from one medium to another with a different density.

Tags

NGSS.MS-PS4-2

Front

State Snell's Law of refraction.

Back

Snell's Law states that n1 * sin(θ1) = n2 * sin(θ2), where n is the refractive index and θ is the angle of incidence or refraction.

Front

What is the refractive index?

Back

The refractive index is a dimensionless number that describes how fast light travels in a medium compared to its speed in a vacuum.

Tags

NGSS.MS-PS4-2

Front

How does the speed of light change when it enters a denser medium?

Back

When light enters a denser medium, its speed decreases, causing it to bend towards the normal.

Tags

NGSS.MS-PS4-2

Front

What is total internal reflection?

Back

Total internal reflection occurs when light attempts to move from a denser medium to a less dense medium at an angle greater than the critical angle, resulting in all light being reflected back.

Tags

NGSS.MS-PS4-2

Front

What is the critical angle in refraction?

Back

The critical angle is the angle of incidence above which total internal reflection occurs, and it can be calculated using the formula: sin(θc) = n2/n1.

Tags

NGSS.MS-PS4-2

Front

Explain the concept of dispersion of light.

Back

Dispersion of light is the separation of light into its constituent colors due to different degrees of refraction for different wavelengths.

Tags

NGSS.MS-PS4-2