2007-04-04 18:08:20 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
it is because your eyes have two different types of cells the cones (for colors) and the rods (for dark vision), when you go to a darker room your rods that were inactivated take some time to activate because this works by chemical reactions.
2007-04-04 18:17:55 · answer #1 · answered by ? 5 · 0⤊ 0⤋
Your pupils actually react astonishingly quickly. Look out through the window and back into a room and you will hardly notice the change in brightness, even though it is at least 1000 fold. So its clearly not that.
It is because the rods and cones in your eyes use different pigments to detect light. Light flips the chemicals from one form to another - allowing its detection - and the body then flips the chemicals back again so they can be reused.
These different chemicals have different reactions to light - and in bright light almost all of the chemicals in the rods have been flipped to their light exposed state. It takes time in the dark for the body to convert enough back to the light unexposed state. THe chemicals in the cones are not sensitive enough to detect light in a dark room.
2007-04-05 00:03:02 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Your pupils are tiny from blocking the massive amounts of light they're exposed to outside the actual theatre. When you go into the room, your pupils are still small, so not much light can get in. As time passes, your pupils get larger and you can see better. This is also why sudden bright lights hurt your eyes in the dark.
2007-04-04 18:12:25 · answer #3 · answered by atmtarzy 2 · 0⤊ 1⤋
The iris of your eyes will open and close to adjust the amount of light coming into your eyes to accommodate your vision. If it is too bright it will become smaller. It it is too dark it will open. This does not happen quickly and the delay is why you have trouble at first seeing in a dark room. This is also why you have to squint when it is too bright.
2007-04-04 18:19:24 · answer #4 · answered by Bomba 7 · 0⤊ 0⤋
It takes a small amount of time for your pupils to change according to the amount of light. When you go from a bright room to a darker one they need time to realize the change and adjust.
2007-04-04 18:16:57 · answer #5 · answered by Sierah 1 · 0⤊ 0⤋