Question

2. What is a natural magnet called? Where was the first natural magnet identified?!
3. State difference between a luminous and a non-luminous body.'
4. What is shadow? How does the color of an opaque object affect the color of the shadow?
5. Why does the bulb not glow when the safety pin is not in touch with the other drawing pin?​

Answer 1

Answer:

2 (answer):

A lodestone is a naturally magnetized piece of the mineral magnetite. They are naturally occurring magnets, which can attract iron. The property of magnetism was first discovered in antiquity through lodestones.

3(answer):

Non-luminous objects do not cause the sensation of light. Luminous objects are visible as they emit light of their own. Non-luminous objects are visible because of luminous objects. Examples of luminous objects include: Sun, Stars, Candle, Oil lamp, Torch, Electrical bulb, Glowing insects, tube light etc.