Question

a concave lens of focal length 15cm forms an image 10cm from the lens how far is the object placed from the lens? draw the ray diagram​

Answer 1

Explanation:

Rajesh painted a pole of length 3 m using 5 different colours. He painted 1/3rd of the pole in blue colour, 1/6th in red colour, 1/9th in orange colour, 1/3rd in black colour and remaining in green colour. Find the length of green coloured part of the pole.