Question Text
Question 1 :
A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and lens are likely to be:
Question 2 :
Where should an object be placed in front of a convex lens to get a real image of the size of the object?
Question 3 :
No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be
Question 4 :
An object 5 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the nature of the image.
Question 5 :
Find the focal length of a convex mirror whose radius of curvature is 32 cm.
Question 6 :
Which one of the following materials cannot be used to make a lens?
Question 7 :
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From the above image, find out the medium having lowest optical density.
Question 8 :
Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
Question 9 :
A doctor has prescribed a corrective lens of power + 1.5 D. Find the focal length of the lens.
Question 10 :
A doctor has prescribed a corrective lens of power + 1.5 D. Is the prescribed lens diverging or converging?