A watch maker uses _ to repair the watches.
Correct answer: C. Convex lens
- A. Telescope
- B. Convex mirror
- C. Convex lens
- D. Concave lens
Explanation
Convex lenses are used in eyeglasses as they increase refraction and accordingly reduce the focal length hence making the images look larger than they are which allows a watchmaker to be able to clearly see the small gears and be able to repair and manufacture watches which contain crucial small parts. This can be seen in the diagram below.
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
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About Optics
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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