Related InterviewSolutions

• Draw a cage on one side of a cardboard and a bird on the other side. Hang the cardboard with the help of a thread. Twist the thread and leave It. What do you see and why?
• How do we perceive different colours?
• Give scientific reason:A convex lens converges the rays of light falling on it.
• Take a burning incense stick in your hand and rotate it fast along a circle.
• State two uses of a concave lens.
• State two uses of a convex lens.
• What is a concave lens?
• Give scientific reason:A concave lens diverges the rays of light falling on it.
• What is colour-blindness?
• Give scientific reason:When a burning stick of incense is moved fast in a circle, a circle of red light is seen.