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Transmitting Photos and Pictures to Distant Places | Photo Receiving System Will Have A Radio Receiver
Radio waves are Electromagnetic waves. Sound waves are transformed to the form of radio waves and then they are broadcasted to different areas from radio stations. Those radio waves are received by various radio receivers present in corresponding areas. They transform the radio waves received into sound waves again. Same procedure is being followed for transmitting photos and movies to distant places. The photo that is to be transmitted will not have uniform intensity in all regions of it. Some regions of the photo may be brighter while some regions may look dull. Some regions may be darker than other regions in the photo.
This fact is used as the key factor in the Radio Photo technique for transmitting it. Transmitting system of photos work using a device called Photo cell. Photos to be transmitted are arranged on a rotating cylinder. Then a light ray is made to fall on the photo. Less bright regions of the photo reflect less light and brighter regions reflect more light. Reflected light rays fall on the Photo cell and generate electric current. Thus intensity of the electric current flow is based on the intensity of light rays reflected from various regions of the photo. As the photo is arranged on a rotating cylinder, the entire photo is scanned. Electric current flow generated in this way is transformed to radio waves and those waves are transmitted.
Radio receiver exists at the location of photo receiving system. Radio waves received are transformed to flow of electric current and that electric current flow of different intensities is sent to an electric bulb. Different intensities of light are emitted by the bulb at different instants based on the intensity of electric current flow. The light of different intensities emitted from bulb is made to fall on the photographic paper arranged on rotating cylinder. As the light of various intensities fall on the paper, they are absorbed variably. Based on that, regions of the photo are formed and thus the entire photo will be obtained on the photographic paper completely as it is.
