PLANCK'S CONSTANT BY Cs PHOTOCELL

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Description

Exp- To determine Planck’s Constant by Cs Photocell.

 
 
 
 
 

Principle and Working:
Einstein postulated that light consists of a quantum of particles, called photon whose energy E is proportioned to the frequency n, by an equation, E = hn, where h is planck’s constant.
In this experiment, narrow band interference filters are used to select wave length, each filter selects precisely one spectral line from the light of a high pressure mercury lamp. The monochromatic light falls on the cathode of the photocell. A capacitor, connected between cathode and anode of photocell, charged by anode, is used. Electrometer amplifier is used to measure the voltage at capacitor without current.

Contents:

Cat. No. Item Name Qty.
SE080 Power Supply 12V AC/DC 5Amp 1
SZ010A Photocell 1
SW440 Mercury Light Source 1
SL754 Convex lens in holder 1
SW752 Iris Diaphragm 1
R7901A Set of Color Filters (Indian/Imported) 1
SD003 Electrometer Amplifier 1
SEB15 Capacitor, 100 pF , 630 V 1
SEB38 Push Switch module 1
SE067 Digital multimeter 1
SL214 Optical bench 1
SL436 Transversal Saddle 1
SN203 Flexible plug lead red (50 cm) 1
SN200 Flexible plug lead black(50 cm) 1
SN207 Flexible plug lead Yellow (100 cm) 1
SN206 Flexible plug lead Yellow (50 cm) 2
SN201 Flexible plug lead black(100 cm) 1
SN204 Flexible plug lead Red(100 cm) 1
C4342 Earthing Lead 1

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