question_answer

(i)  A person approaches a plane mirror with a velocity Y. He approaches his image with a velocity of ____. (ii) The distance between object and image formed by a plane mirror is 60 cm. If the object is moved away from the plane mirror by 15 cm, then the distance between object and image is ___.

Answer:

(i) u (ii) Object distance = Image distance = 30 cm. When the object moves away from the plane mirror by 15 cm, the new object distance becomes \[30+15=45\text{ }cm\]\[\Rightarrow \]The new image distance \[=45\text{ }cm.\] Therefore, the new distance between object and image is equal to\[45+45=90\text{ }cm\]