🌞 Objective Questions (A) Choose the Correct Answer
1. Which is a natural source of light on the Earth?
- Clouds
- Sun
- Sky
- Moon
2. The Earth and the Moon are ______ objects.
- Transparent
- Translucent
- Luminous
- Non-luminous
3. A beam of light coming out through a magnifying glass is —
- Parallel
- Convergent
- Divergent
- Both (b) and (c)
4. If the distance between the pinhole and the screen is increased, the image will become —
- Smaller and brighter
- Larger and fainter
- Smaller and fainter
- Larger and brighter
5. Total solar eclipse occurs when —
- The Sun is visible as a bright circular ring
- The Moon completely hides the Sun
- The Moon hides only a part of the Sun
- The Moon is not visible from the Earth
✏️ Fill in the Blanks
1. In ______ eclipse, the central portion of the Sun is completely hidden by the Moon.
2. A bunch of rays is called a ______.
3. Solar eclipse occurs only on a ______.
4. In a lunar eclipse, the ______ comes in between the ______ and the Sun.
5. Objects such as glass or clear water do not cast ______.
✅ True or False
1. If the size of an extended source is bigger than the object, then the umbra of the shadow is spread over a larger area than the penumbra.
2. Umbra is the darkest part of the shadow.
3. A divergent beam of light is emitted by a laser light.
4. Eclipses are examples of formation of shadows in nature.
5. When a metal is heated to a very high temperature, it becomes luminous.
🔄 Match the Following
| Column A | Column B |
|---|---|
| 1. Lightning | |
| 2. Solar eclipse | |
| 3. A shadow of partial darkness | |
| 4. Image formed by a pinhole camera | |
| 5. Lunar eclipse |
