Homework worksheet on light properties and behavior, including matching definitions with terms and true/false statements.

Let's solve this step by step.

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Part 1: Match the definition with the correct term

We are given 10 definitions and a list of terms (A–J). We need to match each number with the correct letter.

Terms:
- A. 186,000
- B. 8
- C. diffraction
- D. light
- E. medium
- F. opaque
- G. reflection
- H. refraction
- I. translucent
- J. transparent

Now let’s go through each definition:

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1. Another term for an object which passes or reflects light
→ This is a general term for anything that interacts with light. But "light" itself isn't an object. The best fit is D. light, but that doesn’t make sense. Wait — actually, we're looking for a *type* of object.

Wait — re-examining: "Another term for an object which passes or reflects light" → That sounds like it's describing transparent, translucent, or opaque objects. But the term "light" is not an object. Let’s reconsider.

Actually, perhaps it's referring to the medium? No. Hmm.

Wait — maybe it's asking for the term used to describe such objects. But none of the options say “object” directly.

But look at the choices:
F = opaque
I = translucent
J = transparent

All of these are types of objects based on how they interact with light.

But the phrase “another term for an object which passes or reflects light” — that’s vague. However, “light” (D) is not an object. So maybe the intended answer is E. medium? No — a medium is a substance through which waves travel.

Wait — perhaps the question is poorly worded, but likely it means: “Another term for something that interacts with light” — but still.

Alternatively, could it be D. light? No — light is not an object.

Wait — perhaps it's asking for the thing that is reflected or passed — so light?

No — the definition says “an object which passes or reflects light.”

So the object is not light. It’s something else.

But among the options, only F, I, J are types of materials.

But the definition doesn't specify whether it passes or reflects — just that it does one or both.

But all objects either pass, reflect, or absorb light.

But “another term” — what could that be?

Wait — perhaps the answer is E. medium — because a medium can pass light.

But “medium” is a substance, not necessarily an object.

Alternatively, maybe the answer is D. light — no, that doesn’t make sense.

Wait — perhaps the intended answer is D. light, but that's incorrect.

Let’s skip and come back.

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2. Speed light travels in mile per second
→ Light speed is about 186,000 miles per second
→ So answer is A. 186,000

✔ 2 → A

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3. Wave changes direction upon moving from one medium to another
→ That’s refraction
→ So H. refraction

✔ 3 → H

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4. Wave encounters a barrier, causing the wave to return
→ That’s reflection
→ So G. reflection

✔ 4 → G

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5. Wave stays in the same medium but bends around an obstacle
→ That’s diffraction
→ So C. diffraction

✔ 5 → C

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6. Type of object that light can pass through
→ That’s transparent or translucent
But “can pass through” — both allow some passage.

But transparent allows full passage, translucent allows partial.

But the term is “type of object that light can pass through” — so J. transparent is best.

But wait — I. translucent also allows light to pass through.

But “can pass through” — both do.

But typically, transparent is the primary term for allowing light to pass.

But look at the options: both I and J are there.

But the definition says “type of object”, and both are types.

But perhaps the intended answer is J. transparent, since translucent scatters light.

But actually, the term “transparent” is more precise for clear passage.

But let’s see: the definition says “light can pass through” — which applies to transparent and translucent.

But since only one answer is allowed, and J. transparent is the most accurate for full passage, but I. translucent also qualifies.

Wait — perhaps the answer is J. transparent.

But let’s check other clues.

Alternatively, maybe I. translucent is better if it’s not fully clear.

But the definition doesn’t specify clarity.

But in science, transparent means light passes through clearly.

Translucent means light passes but scattered.

So both allow passage.

But the term “transparent” is usually the one associated with passing light.

But let’s see later.

Wait — perhaps the answer is J. transparent.

But hold on — 6 is “Type of object that light can pass through” → so J. transparent

✔ 6 → J

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7. Minutes for light to travel from the sun to the earth
→ Light takes about 8 minutes to reach Earth from the Sun
→ So B. 8

✔ 7 → B

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8. Type of object that causes light to go in different directions.
→ That’s diffuse reflection — but the term is scattering, but not listed.

But translucent or opaque? No.

Wait — translucent allows light to pass but scatters it.

But “causes light to go in different directions” — that’s translucent?

Or rough surface?

But among the options, I. translucent might cause scattering.

But F. opaque blocks light.

Wait — translucent materials scatter light, so light goes in different directions.

Yes — I. translucent

But earlier we had 6 as transparent.

So 8 → I. translucent

But wait — translucent is the type of object that causes light to scatter.

Yes — that makes sense.

✔ 8 → I

But then 6 was “type of object that light can pass through” — both transparent and translucent qualify.

But transparent is clearer — so 6 → J

And 8 → I

Yes.

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9. Type of object that allows light to bounce or reflect off it
→ That’s reflective — but not listed.

But opaque objects can reflect light.

For example, a mirror is opaque and reflects.

So F. opaque

Because transparent and translucent allow light to pass — not reflect.

Opaque objects block light and reflect it.

So 9 → F. opaque

✔ 9 → F

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10. Form of energy seen when reflected off the surface of an object
→ That’s light
→ So D. light

✔ 10 → D

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Now go back to 1:

1. Another term for an object which passes or reflects light
→ We have:
- Transparent: passes
- Translucent: passes and scatters
- Opaque: reflects or absorbs

But the object that passes or reflects light — all three do something.

But “another term” — what could it be?

Wait — perhaps the term is medium?

But a medium is a material through which waves travel — not necessarily an object.

But E. medium?

But “medium” is not an object — it’s a substance.

But maybe it's acceptable.

But look — the only remaining term is E. medium.

We have used:
- A: 2
- B: 7
- C: 5
- D: 10
- E: ?
- F: 9
- G: 4
- H: 3
- I: 8
- J: 6

So E. medium is unused.

But what is “another term for an object which passes or reflects light”?

Maybe it’s medium — because light travels through a medium.

But “passes or reflects” — reflection happens at boundaries, not within medium.

So not quite.

Wait — perhaps the answer is D. light? But that’s not an object.

No.

Wait — maybe the question is misphrased.

Alternative interpretation: “Another term for an object which passes or reflects light” — perhaps it’s referring to a surface or material, but not listed.

But among the options, E. medium is the closest.

But let’s think: medium is the substance through which light travels — so it can pass through.

But it doesn’t necessarily reflect.

But perhaps medium is the best choice.

Alternatively, maybe 1 is E. medium.

But let’s see — is there any other possibility?

Wait — perhaps the answer is D. light — but that’s the energy, not the object.

No.

Wait — perhaps the intended answer is E. medium, even though it’s imperfect.

But let’s check online or logic.

Wait — another idea: “medium” is the term for the material through which light travels.

So if light passes through it, it’s a medium.

If it reflects, it’s at the boundary.

But the object that passes or reflects light — could be a medium or a surface.

But among the options, E. medium is the only one left.

So likely 1 → E

But that seems weak.

Wait — perhaps the answer is F. opaque, but opaque doesn’t pass light.

No.

Wait — perhaps the question is: “Another term for an object which passes or reflects light” — meaning a material that interacts with light — and the term is medium?

Yes — in physics, a medium is the material through which waves travel.

So light passes through a medium — or reflects off its surface.

So E. medium might be acceptable.

So 1 → E

✔ 1 → E

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Now summarize:

| # | Answer |
|---|--------|
| 1 | E. medium |
| 2 | A. 186,000 |
| 3 | H. refraction |
| 4 | G. reflection |
| 5 | C. diffraction |
| 6 | J. transparent |
| 7 | B. 8 |
| 8 | I. translucent |
| 9 | F. opaque |
| 10 | D. light |

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Part 2: True or False

Now evaluate each statement.

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11. There are different practical and scientific applications for each property of light.
→ True — reflection (mirrors), refraction (lenses), diffraction (spectroscopy), etc.
✔ T

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12. Light travels slowest in a vacuum, faster through air, and much faster through water.
→ FALSE. Light travels fastest in a vacuum, slower in air, and even slower in water.
So this is backwards.
✘ F

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13. The amount of light that is reflected will vary depending on the characteristics of the object.
→ TRUE — smooth vs rough, color, material, etc. affect reflection.
✔ T

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14. Understanding reflection led Francesco Grimaldi to discover that light waves can bend.
→ FALSE. Francesco Grimaldi discovered diffraction (bending of light), but he didn't study reflection. He observed diffraction patterns.
Reflection was known earlier.
So this is incorrect.
✘ F

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15. Light travels in a straight line.
→ TRUE in a uniform medium — but it can bend due to refraction or diffraction.
But in general, light travels in straight lines in a homogeneous medium.
This is a basic principle.
✔ T

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16. Rainbows and the colors of a star that twinkle are due to refraction.
→ Rainbows are due to refraction and dispersion — yes.
Star twinkling is due to atmospheric refraction — yes.
So both are due to refraction.
✔ T

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17. The waves of light cannot be controlled or changed.
→ FALSE — we control light with lenses, mirrors, prisms, etc.
Light can be bent, reflected, refracted, absorbed, etc.
✘ F

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18. In order to see your reflection in a mirror, you will need light.
→ TRUE — without light, no reflection occurs. You need light to illuminate you and reflect to your eyes.
✔ T

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19. Refracted light waves are similar to water waves that hit a boat and bend around the boat.
→ NO — bending around a boat is diffraction, not refraction.
Refraction is bending due to change in medium.
Diffraction is bending around obstacles.
So this compares refraction to diffraction — incorrect.
✘ F

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20. Depending on its composition, an object can absorb or reflect wavelengths of light.
→ TRUE — e.g., red object reflects red light, absorbs others.
✔ T

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✔ Final Answers:

#### Matching:

1. E
2. A
3. H
4. G
5. C
6. J
7. B
8. I
9. F
10. D

#### True/False:

11. T
12. F
13. T
14. F
15. T
16. T
17. F
18. T
19. F
20. T

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✔ Summary:

Matching:
1. E
2. A
3. H
4. G
5. C
6. J
7. B
8. I
9. F
10. D

True/False:
11. T
12. F
13. T
14. F
15. T
16. T
17. F
18. T
19. F
20. T

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