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], 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], 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)
![Safety Experiment Leads, 75 cm, black, (2 pcs), 1002849 [U13812], Experiment Leads and Cables](/thumblibrary/U13812/U13812_01_140_140_Safety-Experiment-Leads-75-cm-black-2-pcs.jpg)
![Set of Riders for Rulers, 1006494 [U8401570], 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], Digital Counters](/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)
![Clamp with Hook, 1002828 [U13252], Clamps](/thumblibrary/U13252/U13252_01_140_140_Clamp-with-Hook.jpg)
![Set of Slotted Weights, 20-100 g, 1003226 [U30030], Balance Weights](/thumblibrary/U30030/U30030_01_140_140_Set-of-Slotted-Weights-20-100-g.jpg)
![Linear Resistor, 220 Ohm, 1012912 [U333020], Plug-In Component System](/thumblibrary/U333020/U333020_01_140_140_Linear-Resistor-220-Ohm.jpg)
![Linear Resistor, 330 Ohm, 1012913 [U333021], Plug-In Component System](/thumblibrary/U333021/U333021_01_140_140_Linear-Resistor-330-Ohm.jpg)
![Linear Resistor, 6.8 kOhm, 1012921 [U333029], Plug-In Component System](/thumblibrary/U333029/U333029_01_140_140_Linear-Resistor-68-kOhm.jpg)
![Support for Photo Gate -
variable-g pendulum, 1000756 [U8403955], Oscillations - Accessory](/thumblibrary/U8403955/U8403955_01_140_140_Support-for-Photo-Gate-variable-g-pendulum.jpg)
![Experiment: Variable g Pendulum (230 V, 50/60 Hz), 8000551 [UE1050201-230], Oscillations](/thumblibrary/UE1050201-230/UE1050201-230_01_140_140_Experiment-Variable-g-Pendulum-230-V-5060-Hz.jpg)