Q. 3 I3.9( 18 Votes )
Answer the following:
Mention any four devices that contain a convex lens.
Answer :
Convex lens are used in many days to day use devices below are some of them.
1. Magnifying Glass = Magnifying glass is a convex lens which produces a magnified and erect image of the object when an object is kept between the pole and the focus. The figure below shows the magnifying glass.
2. Camera = Convex lens is used in the camera lens to focus the light for a clean picture of an object. The figure below shows the camera lens.
3. Telescope = In a telescope the convex lens are used to collect the light coming from infinity and form its clear image at the focus. The figure below shows the telescope.
4. Microscope = Convex lens is used in the microscope because they are converging lens and focuses all the light at a specific point, and forms magnified the image of an object.
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Answer the following:
What are the conditions for total internal reflection to take place?
Karnataka Board - Science Part IIFill in the blanks with suitable words :
The type of lens used by watch repairers is ___________.
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Mention any two effects of refraction of light in daily life.
Karnataka Board - Science Part IIAnswer the following:
Mention any four devices that contain a convex lens.
Karnataka Board - Science Part IIFill in the blanks with suitable words :
Bending of light when it passes from one transparent medium to another is called _________.
Karnataka Board - Science Part II