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)
![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], 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)
![External Micrometer, 1002600 [U10070], Measurement of Length](/thumblibrary/U10070/U10070_01_140_140_External-Micrometer.jpg)
![K-Type NiCr-Ni Immersion Sensor, -65°C – 550°C, 1002804 [U11854], Thermometers](/thumblibrary/U11854/U11854_01_140_140_K-Type-NiCr-Ni-Immersion-Sensor-65-C-550-C.jpg)
![Linear Resistor, 100 kOhm, 1012928 [U333036], Plug-In Component System](/thumblibrary/U333036/U333036_01_140_140_Linear-Resistor-100-kOhm.jpg)
![Trolley Track, 1018102 [U35001], Linear Motion](/thumblibrary/U35001/U35001_01_140_140_Trolley-Track.jpg)
![Variable g Pendulum, 1000755 [U8403950], Oscillations](/thumblibrary/U8403950/U8403950_01_140_140_Variable-g-Pendulum.jpg)
![Microphone probe, short, 4008308 [U8498307], Sound](/thumblibrary/U8498307/U8498307_01_140_140_Microphone-probe-short.jpg)