{"product_id":"planck-s-constant-apparatus","title":"Planck’s Constant Apparatus","description":"Product Information: ..\u003cbr\u003eSimple, safe and quick-to-operate, compact apparatus with integrated photocell as well as a voltmeter and nano-ammeter for determining Planck’s constant and the work done in emitting an electron using the stopping potential method. Five light emitting diodes (LEDs) of known mean wavelengths act as light sources of differing frequencies. The intensity of the light emitted by them can be varied from 0 to 100%.\u003cbr\u003e\u003cbr\u003eSpecifications: ..\u003cbr\u003eMains voltage:..\t230 V ±10% (50\/60 Hz)..\u003cbr\u003eWavelengths:\t472 nm, 505 nm, 525 nm, 588 nm, 611 nm\u003cbr\u003eDimensions:\t280 mm x 150 mm x 130 mm approx.\u003cbr\u003eWeight:\t1.3 kg approx.\u003cbr\u003e\u003cbr\u003eContents: ..\u003cbr\u003e1\tBasic apparatus with photocell, voltmeter, nano-ammeter, and power supply for light sources\u003cbr\u003e5\tLEDs in casings with connector leads\u003cbr\u003e1\tPlug-in power supply 12 V AC","brand":"3B Scientific","offers":[{"title":"Default Title","offer_id":49419049795861,"sku":"3BS1000537","price":3184.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/U10700-230_01_Planck-s-Constant-Apparatus.jpg?v=1761020634","url":"https:\/\/unitedsupplycorp.com\/products\/planck-s-constant-apparatus","provider":"United Supply Corp.","version":"1.0","type":"link"}