when a object is kept at a distance of 20cm from a cocave mirror,the image is formed at adistance of 10 cm .if the object is moved with a speedof 4m/s then the speed of image is?
when a object is kept at a distance of 20cm from a cocave mirror,the image is formed at adistance of 10 cm .if the object is moved with a speedof 4m/s then the speed of image is?