SCIENCE-KNOWLEDGE

Science: What's & Why's Engineering &Technology, Physics, General Science, Chemistry , Animal & Plants Science, Geography, Human Science, Modern & Nuclear Physics, Space Science.

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Tuesday, December 24, 2019

How Videos Work ? How do we watch Movies ?

How Videos Work ? How do we watch Movies ?

                              Ans: A video is nothing but a collection of images which are displayed to our eyes continuously with a very short time interval between them. let us see what do we mean by it.

                 when we look at any object, its image is made on rating of human eyes. These images do not get removed from the retina even after removing the object from in front of the eyes.
                 
                  Due to the same attributes of the eye. the video is produced. Continuous photos are flashed so fast that the effect of the picture is not completely eradicated and this happens so fast that it becomes difficult for us to understand these pictures separately and their mixed effect gives us an impression of being dynamic (Video).              

Monday, December 23, 2019

What is X-Ray ?

What is X-Ray ?


                          X-Rays are a from of electromagnetic radiation, as a is visible light, but with some different characteristics.
            The important characteristic of X-Rays is that these can penetrate or pass through the human body but cannot pass through bones, hard items like bullets etc. This effect produces shadow-like images of structures such as bones, bullets etc. on a photographic plate. This helps to understand the inner details of body such as presence of foreign hard  (bullets etc.) or any fracture in the bones.