pupil
The iris has an opening, called the pupil, through which light enters the eye.
What provides light to allow you to view materials on a glass slide
The light microscope allow the scientist to view the bloods in our body.
I learnt in physics today that light has to enter our eye for us to see!
The biconvex transparent structure that focuses light on the retina is called the lens.
no I can't think of a single example of anything that opens wider to allow less to enter.
The iris widens to allow as much light ad possible to enter
Open
Turning the diaphragm will change how much light is let in.
It is a computer operating system or a transparent pane to allow light to enter
they allow light to enter your home, in summer they allow fresh air to circulate, also provide a way of escape incase of fire or intruders..
Does not allow matter to pass, but energy (light, heat, etc) is allowed to enter.
The iris has an opening, called the pupil, through which light enters the eye.
earth is translucent because it allow some light rays to come throw.
Closed (apex)
Because the lens has been focused depending on the available light. if you enter a darker room, your eyes have to re-adjust to allow more light through them.
Pupils are the small, dark circular openings in the center of the iris that allow light to enter the eye. They regulate the amount of light entering the eye by adjusting their size in response to the brightness of the environment.