Photo AI

4 (a) (i) Which lens is a converging lens with the greatest power? A B C D (ii) The equation that relates the power of a lens to the focal length of the lens is power (in dioptres) = \frac{1}{focal \ length \ (in \ metres)} The power of a lens is 5 dioptres - Edexcel - GCSE Physics - Question 4 - 2019 - Paper 1

Question 4

$4-(a)-(i)-Which-lens-is-a-converging-lens-with-the-greatest-power?--A-B-C-D--(ii)-The-equation-that-relates-the-power-of-a-lens-to-the-focal-length-of-the-lens-is--power-(in-dioptres)-=-\frac{1}{focal-\-length-\-(in-\-metres)}--The-power-of-a-lens-is-5-dioptres-Edexcel-GCSE Physics-Question 4-2019-Paper 1.png$

4 (a) (i) Which lens is a converging lens with the greatest power? A B C D (ii) The equation that relates the power of a lens to the focal length of the lens is p... show full transcript

Worked Solution & Example Answer:4 (a) (i) Which lens is a converging lens with the greatest power? A B C D (ii) The equation that relates the power of a lens to the focal length of the lens is power (in dioptres) = \frac{1}{focal \ length \ (in \ metres)} The power of a lens is 5 dioptres - Edexcel - GCSE Physics - Question 4 - 2019 - Paper 1

Step 1

Which lens is a converging lens with the greatest power?

96%

114 rated

Answer

To determine which lens is a converging lens with the greatest power, we can assess the shape of each lens. A converging lens has two outwardly curved surfaces, which allow it to focus light to a point.

From the options given (A, B, C, D), the lens with the most pronounced curvature will have the greatest power. This is because the power of a lens is related to its curvature; a lens that is more curved will have a shorter focal length, resulting in higher power.

Without the actual images, one would typically choose option B or D (if one of them appears significantly more curved compared to the others), as these are usually designed to be converging and show greater convexity.

Step 2

Use the equation to calculate the focal length of the lens in cm.

99%

104 rated

Answer

To find the focal length ( extit{f}) of the lens given that its power ( extit{P}) is 5 dioptres, we use the formula:

$P = \frac{1}{f}$

Rearranging this, we find:

$f = \frac{1}{P} = \frac{1}{5} = 0.2 \text{ metres}$

To convert this value into centimeters, we multiply by 100:

$0.2 \text{ metres} \times 100 = 20 \text{ cm}$

Thus, the focal length of the lens is:

focal length = 20 cm.

97% of Students

Report Improved Results

98% of Students

Recommend to friends

100,000+

Students Supported

1 Million+

Questions answered

Which lens is a converging lens with the greatest power?

Use the equation to calculate the focal length of the lens in cm.

Join the GCSE students using SimpleStudy...

Other GCSE Physics topics to explore