The reasons for the results of Test 2 and Test 3 are afterimages. Bright light creates an afterimage in the eye. The same way you see light in your eye seconds AFTER the doctor shined a light into it. This afterlight makes it possible to see what was there seconds ago. The brightness of the afterimage of the cinema canvas produces such afterimages and thus helps the movie to be flickerfree.
You can download Proofing Tool packs for additional languages. Each pack will include a spell checker and, depending on the language, additional proofing tools such as a grammar checker, thesaurus, or hyphenation. Note that this is not a full language pack.
A test case is a tool used in the process. Test cases may be prepared for software verification and software validation to determine if the product was built according to the requirements of the user. Other methods, such as reviews, may be used early in the life cycle to provide for software validation.n other words, software verification is ensuring that the product has been built according to the requirements and design specifications, while software validation ensures that the product actually meets the user's needs, and that the specifications were correct in the first place.