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The focal length of a convex lens of power4 d is: (a) 20cm (b ) 25 (C) 50 cm (d) 100?
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The focal length of a convex lens of power4 d is: (a) 20cm (b ) 25 (C)...
Power of a lens is reciprocal of focal length
f=1/p or p= 1/p
4D =1/f
f=1/4m
o.25m=25cm
f=1/p or p= 1/p
4D =1/f
f=1/4m
o.25m=25cm
Community Answer
The focal length of a convex lens of power4 d is: (a) 20cm (b ) 25 (C)...
Introduction:
Convex lenses are spherical lenses that converge light rays to a focal point. The power of a lens is defined as the reciprocal of its focal length in meters. In this question, we are given the power of a convex lens and we need to calculate its focal length.
Solution:
We know that the power of a lens is given by the formula:
Power (P) = 1/focal length (f)
Where P is in diopters and f is in meters.
We are given the power of the lens as 4 d. We need to convert it into meters by dividing it by 100:
Power (P) = 4/100 = 0.04 m^-1
Now, we can use the formula to calculate the focal length:
focal length (f) = 1/Power (P)
f = 1/0.04
f = 25 cm
Therefore, the focal length of the convex lens is 25 cm.
Conclusion:
The focal length of a convex lens of power 4 d is 25 cm.
Convex lenses are spherical lenses that converge light rays to a focal point. The power of a lens is defined as the reciprocal of its focal length in meters. In this question, we are given the power of a convex lens and we need to calculate its focal length.
Solution:
We know that the power of a lens is given by the formula:
Power (P) = 1/focal length (f)
Where P is in diopters and f is in meters.
We are given the power of the lens as 4 d. We need to convert it into meters by dividing it by 100:
Power (P) = 4/100 = 0.04 m^-1
Now, we can use the formula to calculate the focal length:
focal length (f) = 1/Power (P)
f = 1/0.04
f = 25 cm
Therefore, the focal length of the convex lens is 25 cm.
Conclusion:
The focal length of a convex lens of power 4 d is 25 cm.
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The focal length of a convex lens of power4 d is: (a) 20cm (b ) 25 (C) 50 cm (d) 100?
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The focal length of a convex lens of power4 d is: (a) 20cm (b ) 25 (C) 50 cm (d) 100? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about The focal length of a convex lens of power4 d is: (a) 20cm (b ) 25 (C) 50 cm (d) 100? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The focal length of a convex lens of power4 d is: (a) 20cm (b ) 25 (C) 50 cm (d) 100?.
The focal length of a convex lens of power4 d is: (a) 20cm (b ) 25 (C) 50 cm (d) 100? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about The focal length of a convex lens of power4 d is: (a) 20cm (b ) 25 (C) 50 cm (d) 100? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The focal length of a convex lens of power4 d is: (a) 20cm (b ) 25 (C) 50 cm (d) 100?.
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