Refraction, Color & Transparent Materials — Practice · Grade 6 Science
Chapter: Electricity, Magnetism & LightWhat this practice covers
By the end of Refraction, Color & Transparent Materials you should be able to:
- I can explain why light changes direction when it enters water or glass.
- I can explain why a submerged object appears shallower than it is.
- I can explain why a red object looks black under green light.
8 questions, written answer and multiple choice, each with a worked explanation.
Vocabulary used: refraction, spectrum, evidence, system boundary, uncertainty.
Problem 1
Answer and explanation
No. Its speed can change while its direction remains along the normal.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 2
Answer and explanation
An intact spoon outside the water and the modeled change in light paths support apparent displacement instead.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 3
Answer and explanation
No. It separates components of the incoming light through wavelength-dependent propagation.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 4
Answer and explanation
The surface cannot reflect an absent green component in this idealized model; observed color depends on both source and material.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 5
Answer and explanation
The ray bends toward the normal because 22° is less than 35° in this air-to-water model. The card appears dark because the red-only source supplies no blue for it to reflect. These diagrams omit detailed wavelength response, intensity, and actual material variation; they are not universal measurements of every card or liquid.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 6
Answer and explanation
A ray traveling directly along the normal can change speed without changing direction. Refraction’s speed change and oblique bending must be distinguished.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 7
- One illustrative result establishes every real condition and needs no further evidence.
- Every ray must bend sideways at every transparent boundary.
- An object appears the same color under every possible light source.
- refraction: A change in light propagation speed at a medium boundary, commonly with oblique bending.
Answer and explanation
refraction: A change in light propagation speed at a medium boundary, commonly with oblique bending.
A change in light propagation speed at a medium boundary, commonly with oblique bending. The ray bends toward the normal because 22° is less than 35° in this air-to-water model. The card appears dark because the red-only source supplies no blue for it to reflect. These diagrams omit detailed wavelength response, intensity, and actual material variation; they are not universal measurements of every card or liquid.
Problem 8
- spectrum: A range of light components distinguished by wavelength.
- Every ray must bend sideways at every transparent boundary.
- An object appears the same color under every possible light source.
- One illustrative result establishes every real condition and needs no further evidence.
Answer and explanation
spectrum: A range of light components distinguished by wavelength.
A range of light components distinguished by wavelength. The ray bends toward the normal because 22° is less than 35° in this air-to-water model. The card appears dark because the red-only source supplies no blue for it to reflect. These diagrams omit detailed wavelength response, intensity, and actual material variation; they are not universal measurements of every card or liquid.