She was just looking outside the window when a beautiful bird "caught the eye."

Sudha finds out that the sharp image of the window pane of her science laboratory is formed at a distance of 15 cm from the lens. She now tries to focus the building visible to her outside the window instead of the window pane without disturbing the lens. In which direction will she move the screen to obtain a sharp image of the building ? What is the approximate focal length of this lens ?

Sudha finds out that the sharp image of the window pane of her science laboratory is formed at a distance of 15 cm from the lens. She now tries to focus the building visible to her outside the window instead of the window pane without disturbing the lens. In which direction will she move the screen to obtain a sharp image of the building ? What is the approximate focal length of this lens ?

A person in a dark room looking through a window can clearly see a person outside in the daylight, where as the person outside cannot see the person inside. Why ?

When I told her about breaking the window, "she goes through the roof."

Light passing from air to glass is refracted ,as is light passing from glass to air. However, when you look out of a window at the view outside, the light does not seem to have been distorted. This is because