Question.
Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
(a) A convex lens of focal length 50 cm
(b) A concave lens of focal length 50 cm
(c) A convex lens of focal length 5 cm
(d) A concave lens of focal length 5 cm
Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
(a) A convex lens of focal length 50 cm
(b) A concave lens of focal length 50 cm
(c) A convex lens of focal length 5 cm
(d) A concave lens of focal length 5 cm
solution:
Option (c) is correct.
For reading small letters in a dictionary, a convex lens of small focal length is used as it is kept quite close to the page of the dictionary.
Option (c) is correct.
For reading small letters in a dictionary, a convex lens of small focal length is used as it is kept quite close to the page of the dictionary.
Click here to get exam-ready with eSaral
For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.