State the characteristics of images formed in a pinhole camera.
Important Questions on Light, Shadows, and Reflections
If you hold a mirror in front of you in a completely dark room, can you see your image in the mirror? Give a reason for your answer.
What are the three things required to observe a shadow?
What is meant by reflection of light? What type of objects reflect more light? What reflects light when we see the images of trees and other objects in a lake?
What is meant by (a) real images, and (b) virtual images? Give one example each of a real image and a virtual image.
How does the reflection of light from a mirror differ from the reflection of light from a piece of white paper? Explain with the help of labelled diagrams.
What is meant by (a) transparent materials (b) translucent materials, and (c) opaque materials? Give two examples each of transparent, translucent and opaque materials.
You see your image in a plane mirror :
(a) State two characteristics of the image formed in a plane mirror.
(b) State one way in which your image in the plane mirror differs from you.
What is meant by luminous objects and non-luminous objects? Name two luminous objects and two non-luminous objects. State whether moon is a luminous object or a non-luminous object.
