Objective: Determine the radius of curvature of various watch glasses.
From the height h of a spherical surface above a point on a plane defined by the corners of an equilateral triangle, the radius of curvature R of the spherical surface may be determined. This can be done for both convex and concave curvatures of the sphere.
![Experiment: Spherometer, 8000517 [UE1010100], Measurement procedures](/imagelibrary/UE1010100/UE1010100_01_Experiment-Spherometer.jpg)
![Experiment: Spherometer, 8000517 [UE1010100], Measurement procedures](/thumblibrary/UE1010100/UE1010100_01_1200_1200_Experiment-Spherometer.jpg)
![Set of 10 Watch Glass Dishes, 80 mm, 1002868 [U14200], Glassware](/thumblibrary/U14200/U14200_01_140_140_Set-of-10-Watch-Glass-Dishes-80-mm.jpg)
![Precision Sphereometer, 1002947 [U15030], Accessory - Measurement of Length](/thumblibrary/U15030/U15030_01_140_140_Precision-Sphereometer.jpg)
![Set of 10 Watch Glass Dishes, 120 mm, 1002869 [U14201], Glassware](/thumblibrary/U14201/U14201_01_140_140_Set-of-10-Watch-Glass-Dishes-120-mm.jpg)
![Plane Mirror, 1003190 [U21885], Glassware](/thumblibrary/U21885/U21885_01_140_140_Plane-Mirror.jpg)
![DC Power Supply 20 V, 5 A (230 V, 50/60 Hz), 1003312 [U33020-230], Power Supplies](/thumblibrary/U33020-230/U33020-230_01_140_140_DC-Power-Supply-20-V-5-A-230-V-5060-Hz.jpg)
![Vertical Ruler, 1 m, 1000743 [U8401560], Accessory - Measurement of Length](/thumblibrary/U8401560/U8401560_01_140_140_Vertical-Ruler-1-m.jpg)
![Photo Gate, 1000563 [U11365], Sensors for Physics](/thumblibrary/U11365/U11365_01_140_140_Photo-Gate.jpg)
![Barrel Foot, 1 kg, 1002834 [U13265], Bases](/thumblibrary/U13265/U13265_01_140_140_Barrel-Foot-1-kg.jpg)
![Tripod Stand 150 mm, 1002835 [U13270], Bases](/thumblibrary/U13270/U13270_01_140_140_Tripod-Stand-150-mm.jpg)
![Pair of Safety Experiment Leads, 75 cm, 1002849 [U13812], Experiment Leads and Cables](/thumblibrary/U13812/U13812_01_140_140_Pair-of-Safety-Experiment-Leads-75-cm.jpg)
![Set of Riders for Rulers, 1006494 [U8401570], Accessory - Measurement of Length](/thumblibrary/U8401570/U8401570_01_140_140_Set-of-Riders-for-Rulers.jpg)
![Digital Counter (230 V, 50/60 Hz), 1001033 [U8533341-230], Measurement of Time](/thumblibrary/U8533341-230/U8533341-230_01_140_140_Digital-Counter-230-V-5060-Hz.jpg)
![Analogue Multimeter ESCOLA 30, 1013526 [U8557330], Hand-held Analog Measuring Instruments](/thumblibrary/U8557330/U8557330_01_140_140_Analogue-Multimeter-ESCOLA-30.jpg)
![Projectile Launcher, 1002654 [U10360], Oblique throw](/thumblibrary/U10360/U10360_01_140_140_Projectile-Launcher.jpg)
![Set of Slotted Weights, 10 x 10 g, 1003227 [U30031], Balance Weights](/thumblibrary/U30031/U30031_01_140_140_Set-of-Slotted-Weights-10-x-10-g.jpg)
![Linear Resistor, 1 kOhm, 1012916 [U333024], Plug-In Component System](/thumblibrary/U333024/U333024_01_140_140_Linear-Resistor-1-kOhm.jpg)
![Linear Resistor, 10 kOhm, 1012922 [U333030], Plug-In Component System](/thumblibrary/U333030/U333030_01_140_140_Linear-Resistor-10-kOhm.jpg)
![HF Patch Cord, BNC/4 mm Plug, 4008293 [U8557626], Experiment Leads and Cables](/thumblibrary/U8557626/U8557626_01_140_140_HF-Patch-Cord-BNC4-mm-Plug.jpg)
![Experiment: Uniformly Accelerated Motion (230 V, 50/60 Hz), 8000528 [UE1030250-230], Translational motions](/thumblibrary/UE1030250-230/UE1030250-230_01_140_140_Experiment-Uniformly-Accelerated-Motion-230-V-5060-Hz.jpg)
![Experiment: Speed of sound in air (230 V, 50/60 Hz), 8000567 [UE1070310-230], Acoustics](/thumblibrary/UE1070310-230/UE1070310-230_01_140_140_Experiment-Speed-of-sound-in-air-230-V-5060-Hz.jpg)