We have already discussed about image formation in a pinhole camera and on a mirror.
Is there any difference in both of these images?
Yes, there is a difference in image formation by a pinhole camera and a plane mirror. Let us see the differences in the tabular column given below.
Real image
Virtual image
The images that can be captured on screen are called real images.The images that cannot be captured on screen are called virtual images.
Real images are always inverted.Virtual images are always upright.
The image formed on the pinhole camera and cinema screen.
The image formed on the plane mirror and concave lens.
Properties of images formed on a plane mirror
  • The plane mirror always forms virtual and upright images.
  • The object size and image size are always equal.
  • The image distance from the plane mirror is equal to the distance of the object from the mirror.
  • Images are laterally inverted.
Fun facts:

Is it possible to transfer information (data) from one place to another by using light rays?
Yes, we can use a device called optical fibre.
  • Optical fibre works on the principle of 'total internal reflection'. By using optical fibre, we can transfer huge amount of data over a large distance.
  • Optical fibre consists of a cable with thin, flexible fibres with a glass core through which light signals are sent.
  • They can be twisted and bent easily.
  • The data which is given to the optical fibres are in the form of pulses of light.
  • The data which is given at the one end reaches the other with negligible losses.
  • Optical fibres have become very important in high-speed communications, such as cable television and high-speed broadband services because we can transmit data very easily with negligible loss.
Working of optical fibres