Which of the following represents an image that is located behind a mirror?
a. +di
b. -do
c. +do
d. -di

Explanation:

There are some conventions while solving the problems based on mirrors. All parameters are taken like x-y coordinate system.

All the measurements are done from the optical centre of the mirror.

is the image distance

is the object distance

is the image distance which is formed behind the mirror.

is the object distance when an object is placed behind the mirror.

So, shows the image that is located behind the mirror. Hence, this is the required solution.

1 - wave length

2 - amplitude

3 - crest

4 - trough

explanation:

duh.

the gas collects in coils that then becomes a liquid that then flows through the coils inside the refrigerator