Properties of Light - Free Printable

Problem Analysis and Solution

The image contains three main tasks related to the properties of light. Let's solve each task step by step.

---

#### Task 1: How does the dentist see the hidden part of a patient's teeth?

Question:
How does the dentist can see the hidden part of patient’s teeth?
Answer: The _______ reflects the _______ from the patient’s _______ to the dentist’s _______. That’s enable the dentist to examine the patient’s teeth easily.

Solution:
Dentists use a mirror to reflect light from the patient's teeth to their eyes. This allows them to see hidden or hard-to-reach areas of the teeth.

- Mirror: Reflects light.
- Light: From the patient's teeth.
- Teeth: The source of reflection.
- Eyes: Where the reflected light is directed.

Completed Answer:
The mirror reflects the light from the patient’s teeth to the dentist’s eyes. That’s enable the dentist to examine the patient’s teeth easily.

---

#### Task 2: Which 'TRUE' or 'FALSE' for every situation below that uses the same property of light?

We need to determine whether each scenario uses the property of reflection (the same property used by dentists in Task 1).

1. Navy uses periscope in the submerged submarine to see what is on the land.
- A periscope uses mirrors to reflect light from above the water into the submarine.
- TRUE (uses reflection).

2. Doctor listens to the patient’s heartbeat using a stethoscope.
- A stethoscope uses sound waves, not light.
- FALSE (does not use reflection).

3. The driver checks on the back of his car using rear-view and wing mirror of his car.
- Rear-view and wing mirrors use reflection to show the driver what is behind the car.
- TRUE (uses reflection).

4. The barbers use the mirror for their customers to see the new haircuts.
- Barbers use mirrors to reflect light so customers can see their reflections.
- TRUE (uses reflection).

5. We can see the colorful flowers in the garden in daylight.
- Seeing flowers in daylight involves light reflecting off the flowers and entering our eyes, but this is not specifically about using a reflective surface like a mirror.
- FALSE (does not use reflection in the same way as mirrors).

Completed Answers:
| Scenario | TRUE/FALSE |
|-------------------------------------------------------------------------|------------|
| Navy uses periscope in the submerged submarine to see what is on the land. | TRUE |
| Doctor listens to the patient’s heartbeat using a stethoscope. | FALSE |
| The driver checks on the back of his car using rear-view and wing mirror of his car. | TRUE |
| The barbers use the mirror for their customers to see the new haircuts. | TRUE |
| We can see the colorful flowers in the garden in daylight. | FALSE |

---

#### Task 3: Study the diagram below. Label the ray of light in the diagram.

The diagram shows a source of light (a torch) shining on a flat surface. The light ray hits the surface and reflects off it. We need to label the ray of light.

Diagram Description:
- The source of light/torch light emits a beam of light.
- The light ray travels downward and hits the surface at an angle.
- After hitting the surface, the light ray reflects off at an equal angle.

Steps to Label the Ray of Light:
1. Identify the direction of the incoming light ray (incident ray).
2. Identify the direction of the outgoing light ray (reflected ray).
3. Use standard labels for these rays:
- Incident ray: The ray coming from the source.
- Reflected ray: The ray going away from the surface after reflection.

Labeling:
- The ray coming from the torch and hitting the surface is the incident ray.
- The ray bouncing off the surface is the reflected ray.

Final Labels:
- Label the ray coming from the torch as the incident ray.
- Label the ray bouncing off the surface as the reflected ray.

---

Final Answers

1. Task 1:
The mirror reflects the light from the patient’s teeth to the dentist’s eyes. That’s enable the dentist to examine the patient’s teeth easily.

2. Task 2:
| Scenario | TRUE/FALSE |
|-------------------------------------------------------------------------|------------|
| Navy uses periscope in the submerged submarine to see what is on the land. | TRUE |
| Doctor listens to the patient’s heartbeat using a stethoscope. | FALSE |
| The driver checks on the back of his car using rear-view and wing mirror of his car. | TRUE |
| The barbers use the mirror for their customers to see the new haircuts. | TRUE |
| We can see the colorful flowers in the garden in daylight. | FALSE |

3. Task 3:
- Label the ray coming from the torch as the incident ray.
- Label the ray bouncing off the surface as the reflected ray.

---

Final Answer Box

\[
\boxed{
\text{1. Mirror, light, teeth, eyes} \\
\text{2. TRUE, FALSE, TRUE, TRUE, FALSE} \\
\text{3. Incident ray, Reflected ray}
}
\]