Question

test your learning outcome

1. what is a luminous body?
2. name one natural luminous body.
3. is moon a luminous body?
4. what makes moon visible to us?
5. what isrectilinear propagation of light?
6. why is shadow formed in the direction opposite to the source of light?

Explanation:

1. A luminous body is an object that emits its own light.
2. The Sun is a natural luminous body.
3. The Moon is not a luminous body as it does not emit its own light.
4. The Moon is visible to us because it reflects the light of the Sun.
5. Rectilinear propagation of light means that light travels in straight - line paths in a homogeneous medium.
6. A shadow is formed in the direction opposite to the source of light because light travels in straight lines and the opaque object blocks the light rays from reaching that area.

Answer:

1. An object that emits its own light.
2. The Sun.
3. No.
4. It reflects the light of the Sun.
5. Light travels in straight - line paths in a homogeneous medium.
6. Because light travels in straight lines and the opaque object blocks the light rays from reaching that area.