Which among the following is an example of photochemistry used in our ...
Photography is an example of photochemistry used in our daily life.
View all questions of this test
Which among the following is an example of photochemistry used in our ...
The chemical involved in photography is silver bromide (AgBr), thiosulfate and real ion. The photochemistry in photography works when the silver bromide, which has high sensitivity to light, in the film of the camera, absorbs the light when the picture is taken. When the picture is developed, the thiosulfate dissolved the silver bromide that had been exposed to light more easily than the one that had been kept in the dark.
Which among the following is an example of photochemistry used in our ...
Photochemistry in Daily Life: Photography
Introduction:
Photochemistry is the branch of chemistry that deals with the chemical effects of light. It involves the study of the interaction of light with matter and the subsequent chemical reactions that occur. Photochemistry plays an essential role in various aspects of our daily lives. One prominent example of photochemistry in daily life is photography.
Photography and Photochemistry:
Photography is the process of capturing and preserving images using light. It relies on the principles of photochemistry to record and develop images. The key steps involved in photography are:
1. Exposure:
In photography, the first step is the exposure of light-sensitive film or digital sensors to the scene being photographed. The light-sensitive material used in photography contains compounds known as photosensitive or photosensitive dyes. These dyes are capable of undergoing chemical changes upon exposure to light.
2. Light Absorption:
When light falls on the photosensitive material, the photosensitive dyes absorb photons of specific wavelengths. This absorption of light energy promotes the dyes to higher energy states.
3. Electron Excitation and Transfer:
The absorbed photons cause the electrons in the photosensitive dyes to become excited and move to higher energy levels. Some dyes undergo a process called electron transfer, where an excited electron is transferred to a neighboring molecule.
4. Chemical Reaction:
The excited state of the dye or the transferred electron initiates a chemical reaction within the photosensitive material. This reaction leads to the formation of a latent image, which is invisible to the naked eye.
5. Development:
To make the latent image visible, the photosensitive material undergoes a development process. This process involves treating the material with chemicals that react with the photochemically altered areas, forming a visible image.
6. Fixing and Stabilization:
After development, the image is fixed to prevent further chemical reactions from occurring. Fixing removes any unexposed or undeveloped areas of the photosensitive material. The stabilized image is then washed and dried to preserve it.
Conclusion:
Photography is a remarkable example of photochemistry used in our daily life. It relies on the principles of photochemical reactions to capture and develop images. The exposure of light-sensitive material, absorption of light, electron excitation and transfer, chemical reactions, development, fixing, and stabilization are all essential steps in the process of photography. Therefore, option B, "In photography," is the correct answer.