How is the scene viewed in a camera lens transferred to the film in the camera?

Light bouncing off of everything in the scene is focused into a smaller, upside down version of the scene via the lens. This happens because light bends when it goes from one type of medium (air) to another (glass). The lens is made of several specially shaped pieces of glass to ensure that the light focuses the image clearly.

When you look through an SLR viewfinder, what you see is that image, focused by the lens, bouncing off of a mirror inside the camera, and focusing onto a small rectangle of glass that has a sandblasted or "ground" surface. So you are viewing the actual light from the scene, focused onto that glass surface.

When you depress the shutter release, the mirror moves out of the way, a shutter opens, and the image is now focused on the film. So for that duration of time, you can't see the image in the viewfinder. The chemicals in the film are altered by exposure to light, and there is a "latent image" meaning that you can't see it, but it comes out when the film is developed in a special chemical process. Most films are "negative" films, meaning that light tones are rendered dark, dark tones are rendered light (or clear, really), red is rendered green, green is rendered red, etc. When the film is printed, the printing paper is also a negative paper, so that the colors and tones are restored to their natural relationships (or close, anyway).

Slide or "transparency" film is positive film, meaning that tones and colors are rendered naturally in development. Slides are usually projected or scanned, rather than being printed. However, slide film is what was used most often for magazine reproduction.

For a rangefinder, twin-lens or viewfinder type camera, the viewed image is completely separate from the image generated by the main lens for the film. Such cameras have a "taking lens" (for the film image) and a "viewing lens" to compose the scene. In these cameras, there is no mirror in the way of the film, so when the shutter is released, the image is simply focused on the film.

The shutter opens and closes, allowing the focused image to fall on the film for a split-second.

Simple for this you need to understand, what is a Film

Film is a simple Photosensitive material, which reacts to light.
Lens is a medium in which the Film is exposed to Light..
When you click a picture on the camera, there is a shutter in your camera that controls how long the flim has to be exposed to the light. and when you click it.. the flim is exposed for that duration and during which the Flim catched the image. By some chemical reactions these fine details can be printed out

The correct answer is: MAGIC