Planck's Constant By Cs Photocell

PLANCK'S CONSTANT BY Cs PHOTOCELL SK054

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

Multipurpose electrometer amplifier.
Cs photo cell.
Multipurpose power supply.
Monochromatic light source may be used in many other experiments also.
Hexagonal optical bench.

Photoelectric effect.
Photo cell.
Work function.
Planck's constant.
Photoelectric voltage.
Photon energy.

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

Photocell SZ010A
- SPECIFICATIONS Photocell : Cs, vacuum tube.
  Output : 4mm safety socket.
  Mounting rod : 10mm dia.
Optical Bench SL214
- SPECIFICATIONS Material : Aluminium alloy
  Type : Hexagonal section
  Scale : 0-100cm
  Least count : 1mm
Set of Colour Filter R7901A
- SPECIFICATIONS Red : 635 nm
  Orange : 570 nm
  Yellow : 540 nm
  Green : 500 nm
  Blue : 460 nm
Electrometer Amplifier SD003
- SPECIFICATIONS Input Impedance : >1013 W
  Input Current : < 0.5pA
  Output Voltage : upto +10V
  Output Current : 5mA (Short Circuit Protected)
  Output impedance : < 1W
  Supply Voltage : 12 V AC
Power Supply 12V AC/DC SE080/SN909
- SPECIFICATIONS Output : 2,3,4,5,6,8,10 & 12V AC full wave rectified, unsmoothed & unregulated D.C.
  Overload : Resettable thermal trip.
  Input : 230 V AC,50 Hz
Transverse Saddle SL436
- SPECIFICATIONS Material : Aluminium
  Locking : Spring loaded
  Motion : X-Y axis
  Holder : 10mm dia.
Convex Lens in Holder SL754
- SPECIFICATIONS Focal Length : 100mm
  Diameter of Lens : 50 mm
  Frame Diameter : 130 mm to avoids scattering of lights
  Rod Diameter : 10 mm
Iris Diaphragm SW752
- SPECIFICATIONS Slit Opening : upto 20mm
  Frame Diameter : 120 mm to avoids scattering of lights
  Rod Diameter : 10 mm
Mercury Light Source SW440
- SPECIFICATIONS Starting Voltage : 470 Volts
  Input Voltage : 220 Volts, 50 Hz.
  Lamp House : 250 x 100mm (L x dia.)
  Aperture dia. : 25mm
  Mercury Lamp : 125W
  Scope of Supply : Complete with housing for mercury vapor lamp, transformer, base, mounting rod, bosshead and mercury bulb.
Digital Multimeter SE067
- SPECIFICATIONS Resistance : 200W, 2000W, 20k, 200k & 2000k W.
  D.C.Voltage : 200 & 2000 mV
  : 20, 200 & 600 V
  A.C.Voltage : 200 & 600 V
  D.C.Current : 200 & 2000 mA
  : 20 & 200 mA
  : 10 A
  Testing : Diode & transistor
  Battery : 9V

Plug in Modules

SPECIFICATIONS

Cat. No.	Item Name
SEB15	Capacitor, 100 pF (A)
SEB14	Capacitor, 0.01uF (B)
SEB38	Push switch module (C)

Available on Request
Four Interference Filters (C0449A) instead of Six Color Fiters (R7901A)

PLANCK'S CONSTANT BY Cs PHOTOCELL SK054

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