A person in a dark room looking through a window can clearly see a person outside in the daylight, whereas the person outside cannot see the person inside. Explain.

The 8% reflection of the objects inside the room off the glass is brighter than the light coming from the darkness outside. When looking from outside, the reflection off the glass of outside objects is negligible compared to the 92% that comes through the glass from inside.

This phenomenon can be explained by the difference in lighting conditions between the inside of the room and the outside. When a person is in a dark room looking through a window, their eyes have adapted to the low levels of light inside. Since the room is dark, the person's pupils are dilated to allow as much light as possible to enter their eyes.

On the other hand, when a person is outside in the daylight, the intensity of the light is significantly higher compared to the darkness inside the room. Consequently, their eyes adjust to the bright lighting conditions by constricting their pupils.

The difference in pupil size is crucial here. When a person's pupils are dilated due to the low light levels inside the room, they allow more light to enter their eyes. As a result, even though the room is dark, the person can clearly see what's happening outside through the window because their eyes are extremely sensitive to light in such conditions.

However, when a person is outside in the daylight, their constricted pupils limit the amount of light that enters their eyes. In this case, it becomes more difficult for them to perceive what's happening inside the dark room through the window since the contrast between the intense exterior light and the dim interior light is significant.

In summary, the person in the dark room can see the person outside in the daylight, while the person outside cannot see the person inside because the dark room has caused their eyes to adapt to low light conditions, enabling them to see with more sensitivity in comparison to the bright exterior.