Question

A concave mirror has a focal length 20 cm . At what distance from the mirror should a 4 cm tall object be placed so that it forms an image at a distance of 30 cm from the mirror ? Also calculate the size of image formed


pls explain me what will be the sin convention of V...and why??/

Answer 1

Answer:

Sin convention for V will be - ve because the image is formed 30 from the mirror which means behind the mirror and in mirror when image is formed behind it means it is virtual and for virtual sign is negative