Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


1. The property of light travelling in straight lines which is rectilinear propagation of light. As it does not scatter all over the place, a strong parallel beam is obtained on the screen.
2. When the light falls on the screen it is reflected back to our eyes which enables us to see.
3 5 3
The reflection cause this property to see the path of light in the darkness of a cinema hall
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts