The energy that enters any kind of camera through the lens is called light.
An aperture is a hole where light travels through. Therefore in any camera there is always an aperture - including digital cameras - even if it is fixed
Digital camera
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Most digital camera sensors are sensitive to a small range of IR, as well as visible light.
light
It focuses the light entering the camera onto the sensor.
The Color of Canon SD890 Digital camera is light blue, pale blue.
Any film camera with a light meter, and every digital camera, has a sensor that will do that.
A digital camera has a surface that it made up of many tiny electronic devices that produce signals when light coming in through the lens falls on them. These signals are recorded inside the camera. A 35mm film camera uses film as that surface. Film changes chemically when touched by light. This film is later removed from the camera and put in a chemical solution that makes it possible to see the image.
Light rays travel in a straight line from the object through the lens of the camera to create an inverted image on the camera sensor. The lens focuses the light rays to converge at a specific point, forming a sharp image. The camera sensor then captures this image by recording the intensity of light at each point.
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