🌞 Objective Questions (A) Choose the Correct Answer
1. Which is a natural source of light on the Earth?
- Clouds
- Sun
- Sky
- Moon
(b) Sun
2. The Earth and the Moon are ______ objects.
- Transparent
- Translucent
- Luminous
- Non-luminous
(d) Non-luminous
3. A beam of light coming out through a magnifying glass is —
- Parallel
- Convergent
- Divergent
- Both (b) and (c)
(b) Convergent
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
(b) Larger and fainter
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
(b) The moon completely hides the sun
✏️ Fill in the Blanks
1. In ______ eclipse, the central portion of the Sun is completely hidden by the Moon.
Annular solar eclipse
2. A bunch of rays is called a ______.
Beam
3. Solar eclipse occurs only on a ______.
New Moon day
4. In a lunar eclipse, the ______ comes in between the ______ and the Sun.
Earth comes in between the Moon and the Sun.
5. Objects such as glass or clear water do not cast ______.
Shadows
✅ 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.
False
2. Umbra is the darkest part of the shadow.
True
3. A divergent beam of light is emitted by a laser light.
False – Laser gives a parallel beam of light.
4. Eclipses are examples of formation of shadows in nature.
True
5. When a metal is heated to a very high temperature, it becomes luminous.
True
🔄 Match the Following
| Column A | Column B |
|---|---|
| 1. Lightning |
(b) Natural source of light |
| 2. Solar eclipse |
(e) New Moon day |
| 3. A shadow of partial darkness |
(d) Penumbra |
| 4. Image formed by a pinhole camera |
(c) Inverted image |
| 5. Lunar eclipse |
(a) Full Moon night |
