Final answer:
Film emulsion's sensitivity to heat and humidity is true; extreme conditions affect chemical reactions and film quality. Sensitivity to developing chemicals can lead to allergic reactions, and the emulsion's higher sensitivity to blue-violet light is because it has greater energy, affecting the silver compounds more. Thin film interference can influence photographic processes.
Step-by-step explanation:
Film emulsion is indeed sensitive to heat and humidity, and this is true. The properties of film emulsion can be significantly affected by environmental conditions. Heat can accelerate chemical reactions within the film, leading to increased grain and potential fogging of the image, while humidity can affect the physical structure of the emulsion, leading to swelling or shrinking, which can also degrade image quality.
Photographers who develop their photographs manually must handle a variety of chemicals that can over time cause sensitivities or allergic reactions. When individuals develop rashes on their hands due to exposure to these chemicals, it's likely that they've developed a contact dermatitis, which is an allergic response to a substance with which they are in contact.
The sensitivity of photographic emulsions to light is due to the energy content of different wavelengths. Historically, emulsions were more sensitive to blue and violet light because blue-violet light contains a greater amount of energy than red light, allowing it to have a greater effect on the silver compounds in the film.
Thin film interference is a phenomenon that occurs when light waves reflect off different layers within a film, creating a pattern of constructive and destructive interference. This can lead to various colors appearing due to different wavelengths of light being amplified or cancelled out. Thin film interference can play a role in photography, particularly in understanding how light interacts with the film.