Long answers questions
2. With the help of an experiment, show that light travels in straight lines. (3. Explain the formation of a shadow: a. When the extended source of light is bigger than the object. b. When the extended source of light is smaller than the object.
4. Describe the construction and working of a pinhole camera.
5. Explain the formation of solar eclipse with the help of a diagram.
Answers & Comments
1.The source of light
2.The placement of object
3.Needs proper base