two mirrors are kept perpendicular to each other . a ray strikes one mirror at an angle of 45 degree to the normal find the direction of the ray after reflection by the second mirror by drawing a ray diagram

how is colour blindness caused ? how it can be cured?

 what is light ?

what is the principle behind the working of a kaleidoscope???

plz aswer as soon as possible...

name the scientist who discovered that sunlight consists of seven colours.

state the laws of reflection

how to make a periscope??

what are the properties of light?

 What type of image is formed on a cinema screen?

how could i make model for human eye

function of electroscope

can a glass slab bend different coloured lights by different amounts?

 The image formed on the retina persists for aboutof a second. This means that if you are shown still pictures of a moving object at a rate faster than 16 seconds, then the object will appear to be moving. This is because, the image of a picture stays on your retina for of a second and you will not be able to recognize the time taken to change these pictures. 

Hello, I have not understood this para. Please explain......

what is the difference between image and shadow??????????