you dont have to control it they are controlled by pupil and iris
its a concave lens(:
The iris is the colored area in the eye and is surrounded by the sclera,the white section in the human eye.The absence of iris affect vision. Its function is important because it is responsible for regulating the amount of light that enters the eye..Too much or too little light that gets into the eye hampers vision,.It controls the amount of light that enters the eye by opening and closing the pupil.
The most.
compound light microscope
compound light microscope
They refract the light before it enters your eye the precise amount it needs adjusting to make the light hit your retina in the correct position.
Blinds work by adjusting the angle of the slats to either let in more or less light. When the slats are angled upwards, more light enters the room, and when they are angled downwards, less light enters. By raising or lowering the blinds, you can further control the amount of light that comes in.
When light enters a different medium, the amount that the light is bent as it enters the medium is determined by the medium's index of..........=refraction
When light enters a different medium, the amount that the light is bent as it enters the medium is determined by the medium's index of..........=refraction
the iris
A camera shutter is like a curtain that opens and closes to control how long light enters the camera. When the shutter opens, light enters the camera and hits the image sensor or film. The longer the shutter is open, the more light enters, and the brighter the image. The shutter speed determines how quickly the shutter opens and closes, affecting the amount of light that reaches the sensor.
When light enters a different medium, the amount that the light is bent as it enters the medium is determined by the medium's index of..........=refraction
Blinds are window coverings made of slats that can be adjusted to control the amount of light and privacy in a room. By tilting the slats, you can regulate the amount of light that enters the room while still maintaining privacy. When the blinds are fully closed, they block out light and provide maximum privacy.
The camera aperture is like the pupil of the eye, adjusting in size to control the amount of light that enters the camera. A smaller aperture lets in less light, while a larger aperture lets in more light. This helps to regulate the exposure of the image being captured.
Shutters are adjustable window coverings with slats that can be opened or closed to regulate the amount of light and privacy in a room. By adjusting the angle of the slats, you can control the amount of light that enters the room while still maintaining privacy. When the slats are closed, they block out light and provide maximum privacy, while opening them allows more light to enter the room.
Diaphram
Basically they're set to offer the best protection against light. They typically allow very precise control over the amount of sun, or other, light that enters a room.