Light

How does the angle of incidence relate to refraction?

• The angle of incidence is the angle between the incoming light ray and the normal line; it affects the angle of refraction according to Snell's Law.

• The angle of incidence is always equal to the angle of refraction regardless of the medium.

• The angle of incidence has no effect on the angle of refraction; they are independent of each other.

• The angle of incidence is the angle between the incoming light ray and the surface of the medium, not the normal line.

What is the index of refraction?

• A measure of how much light slows down in a medium compared to its speed in a vacuum.

• The speed of light in a vacuum divided by the speed of light in a medium.

• The angle at which light enters a medium.

• A property that determines the color of light in a medium.

How does light behave when it passes through a prism?

• It is absorbed completely by the prism.

• It is reflected back without any change.

• It is refracted at different angles depending on its wavelength, resulting in the dispersion of light into its constituent colors.

• It travels straight through without any alteration.

What is total internal reflection?

• A phenomenon where light passes through a less dense medium into a denser medium.

• A process where light is absorbed by a medium and does not pass through.

• A situation where light reflects entirely back into a denser medium when it hits the boundary at an angle greater than the critical angle.

• A type of refraction that occurs at the surface of a liquid.

What causes light to bend when it enters water from air?

• A change in speed

• A change in color

• A change in temperature

• A change in pressure

Why does a fork look different when viewed underwater?

• Because it is made of a different material underwater.

• Because light is refracted at an angle, altering its appearance.

• Because the water changes its color.

• Because the fork is submerged and cannot be seen clearly.

What role does the medium play in the speed of light?

• The medium has no effect on the speed of light.

• Light travels fastest in water.

• Light travels fastest in a vacuum and slows down in denser media like water or glass.

• The medium only affects the color of light.

What is the relationship between light color and reflection?

• The color of an object is determined by the wavelengths of light it reflects; for example, a yellow shirt reflects yellow light and absorbs other colors.

• Light color has no effect on reflection; all colors are reflected equally.

• Objects appear white when they reflect all wavelengths of light equally.

• The color of an object is determined by the wavelengths of light it emits rather than reflects.

What is the difference between reflection and refraction?

• Reflection is the bending of light as it passes through different media, while refraction is the bouncing back of light when it hits a surface.

• Reflection is the bouncing back of light when it hits a surface, while refraction is the bending of light as it passes through different media.

• Reflection and refraction are the same phenomenon occurring at different angles.

• Reflection occurs only in water, while refraction occurs in air.

What happens to the appearance of a pencil when placed in water?

• The pencil appears broken or displaced due to the refraction of light.

• The pencil appears to float on the surface of the water.

• The pencil looks unchanged and remains straight.

• The pencil appears to be longer than it actually is.