Question

an object is placed at 20 cm in front of a plane mirror the mirror is moved 15 cm away from the object . find the
1...distance between object and mirror ,
2... distance between two positions of image

plz help me


i have posted this question many times but no one is helping me
plz help me hope u will​

Answer 1

Answer:

1.20+15=35

2.35-20=15

is my answer correct ????

Answer 2

Explanation:

plane mirror forms virtual erect and same size as object image also it forms image at equal distance as that of object

therefore

1) Total distance between mirror and object will be 20+15=35cm

2) distance of image from first point=2*distance of object from mirror=2*20=40cm

distance of image from second point=2*new distance of object from mirror=2*35=70cm