A lens has a focal length of 15 cm. What is the power of the lens? (2023)

A lens has a focal length of 15 cm. What is the power of the lens? (2023)

Step 1: Understand that the power of a lens is calculated using the formula P = 1/f, where P is the power in diopters (D) and f is the focal length in meters.
Step 2: Convert the focal length from centimeters to meters. Since the focal length is given as 15 cm, we convert it to meters by dividing by 100. So, 15 cm = 15/100 = 0.15 m.
Step 3: Substitute the focal length in meters into the power formula. Now we have P = 1/0.15.
Step 4: Calculate the power. When you divide 1 by 0.15, you get approximately 6.67.
Step 5: Write the final answer. The power of the lens is +6.67 D.

Lens Power Calculation – The power of a lens is calculated using the formula P = 1/f, where f is the focal length in meters.