LENSMAKER’S EUQATION - OBSERVATIONS Figure...

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1 OBSERVATIONS Figure 1 Figure 2 f(cm) R 1 =R 2 (cm) Measured 12.3 13.6 Calculated 13.6 - % Difference 9.5588% - Table 1
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2 DISCUSSION In this lab experiment we explored how the properties of a concave lens behaves according to it focal point by looking at its diverging rays of the ray beam. And also from this lab experiment we could get to know the Lensmaker’s Equqtion and how to calculate the focal length using that equation. Theories Diverging parallel rays trace back to the focal point. The light does not actually pass through the focal point. So that we can’t make a fire focusing sunlight with a diverging lens. Lensmaker's equation The focal length of a lens in air can be calculated from the lensmaker's equation: where f is the focal length of the lens, n is the refractive index of the lens material, R 1 is the radius of curvature of the lens surface closest to the light source, R 2 is the radius of curvature of the lens surface farthest from the light source, and d is the thickness of the lens (the distance along the lens axis between the two surface vertices).
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LENSMAKER’S EUQATION - OBSERVATIONS Figure...

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