What are illuminated objects?
Explanation:
When an illuminated object is held in front of a thick plane glass mirror, several images are seen, out of which the second image is brightest. Give reason.
State whether the following statements are true or false :
(a) The moon is an illuminated object.
(b) Diffuse reflection means the failure of the laws of reflection of light.
(c) In a kaleidoscope,a pattern seen once can never be seen again.
Which one of the following is an illuminated object?
an illuminated object and a screen are placed 60cm apart. What is the focal length and nature of the lens required to produce sharp image on the screen twice the size of the object?