Question

completely
5. A dark spot formed when an object blocks light
C. Answer the following.
1. Differentiate between luminous and non-luminous objects.
2. What are transparent objects? How are they different from translucent objects?
3. Why do transparent objects not cast a shadow?
4 What are the three things needed for a shadow to form?
S. Write any two features of a shadow.
6. With the help of a diagram show how shadows are formed during noon and the morning,
156 ught and Shadow

Answer 1

Answer:

C. A+Q

¹ans - Objects that can emit light energy by themselves are known as luminous objects. Objects that cannot emit light energy by themselves are known as non-luminous objects.

²ans - When light encounters transparent materials, almost all of it passes directly through them. Glass, for example, is transparent to all visible light. Translucent objects allow some light to travel through them. Materials like frosted glass and some plastics are called translucent.

³ans - Transparent objects do not form shadows. The light passes completely from the transparent objects thus these objects will not form shadow.

⁴ans - There should be a source of light.

An opaque object.

A screen.

Hope it helps