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DANB's LDRT (LDRT) Practice Tests & Test Prep by Exam Edge - Exam Info



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The more you know about the DANB's LDRT exam the better prepared you will be! Our practice tests are designed to help you master both the subject matter and the art of test-taking to be sure you are fully prepared for your exam.

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DANB's Licensed Dental Radiologic Technologist - Additional Information

At ExamEdge.com, we focus on making our clients' career dreams come true by offering world-class practice tests designed to cover the same topics and content areas tested on the actual Dental Assisting National Board DANB's Licensed Dental Radiologic Technologist (LDRT) Certification Exam. Our comprehensive DANB's Licensed Dental Radiologic Technologist practice tests are designed to mimic the actual exam. You will gain an understanding of the types of questions and information you will encounter when you take your Dental Assisting National Board DANB's Licensed Dental Radiologic Technologist Certification Exam. Our DANB's Licensed Dental Radiologic Technologist Practice Tests allow you to review your answers and identify areas of improvement so you will be fully prepared for the upcoming exam and walk out of the test feeling confident in your results.

Because our practice tests are web-based, there is no software to install and no need to wait for a shipment to arrive to start studying. Your DANB's Licensed Dental Radiologic Technologist practice tests are available to you anytime from anywhere on any device, allowing you to study when it works best for you. There are 15 practice tests available, each with 100 questions and detailed explanations to help you study. Every exam is designed to cover all of the aspects of the DANB's LDRT exam, ensuring you have the knowledge you need to be successful!

DANB's Licensed Dental Radiologic Technologist - Additional Info Sample Questions

Which of the following is a chemical change that occurs within the development of film emulsion?

Correct Answer:
selective reduction. 


selective reduction is the correct answer to the question about which process is a chemical change occurring during the development of film emulsion. this process is central to how photographic films capture and display images.

in photographic film, an emulsion of silver halide is coated on a surface. when the film is exposed to light, the silver halide crystals become activated. however, not all parts of the film are exposed equally, leading to varying levels of exposure across the surface. this variance is crucial for forming images, as it represents different shades from light to dark depending on the exposure.

once the film is exposed, it undergoes development, a chemical process where the latent (invisible) image becomes visible. the key to this transformation is the selective reduction of the exposed silver halide crystals into metallic silver. during this reaction, the developer chemicals reduce the silver ions in the exposed areas to metallic silver, which is black, thereby creating the visible image. the unexposed silver halide remains unchanged and is later removed during the fixing stage.

the term "selective" in selective reduction is vital because it highlights that this chemical change only targets the exposed silver halide crystals, leaving the unexposed ones intact until the fixing stage. this selectivity is what allows for the detailed reproduction of light and shadow in photographic images.

thus, selective reduction is not just a chemical change but a fundamental process in photographic imaging that transforms the invisible latent image into a visible form through the chemical reduction of silver ions to metallic silver in the exposed areas of the film emulsion. this process is distinct from other changes such as oxidation, reticulation, or wet reading, which involve different mechanisms and effects in photographic processing.