Question : Convex mirrors are used as rear-view mirrors in motorcycles because:
Option 1: It forms a virtual image
Option 2: It forms an erect (upright) image
Option 3: It forms a smaller image as compared with the object
Option 4: All of the above
Correct Answer: All of the above
Solution : The correct answer is All of the above.
A convex mirror is a diverging mirror that has its outward curved surface as the reflecting surface. They always form an erect, virtual, and smaller image of the given object. It covers a larger area, and because of all these properties, it is used as a rear-view mirror in motorbikes. It gives the rider a wider rear image in a comparatively small mirror size.
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Question : A concave lens forms an image which is:
Option 1: real and erect
Option 2: virtual and erect
Option 3: real and inverted
Option 4: virtual and inverted
Question : An electron microscope gives higher magnifications than an optical microscope because:
Option 1: The velocity of electrons is smaller than that of light.
Option 2: The wavelength of electrons is smaller as compared to the wavelength of visible light.
Option 3: The electrons have more energy than the light particulars.
Option 4: The electron microscope uses more powerful lenses.
Question : In a magnifying glass, _________ lens is used.
Option 1: convex
Option 2: concave
Option 3: plano-concave
Option 4: plano-convex
Question : RAM is used as a short memory in a computer because it:
Option 1: is volatile
Option 2: is programmable
Option 3: has less capacity
Option 4: is very expensive
Question : The part of the eye that is responsible for the conversion of the image of an object into neural signals is:
Option 1: Iris
Option 2: Optic nerve
Option 3: Vitreous humour
Option 4: Retina
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