Physics Lab Equipment

LEOK-30 Newton's Ring Experiment Apparatus - Complete Model

LEOK-30 Newton's Ring Experiment Apparatus - Complete Model

Features

  • Including Sodium lamp with power supply

  • Including reading microscope for accurate measurement

  • Compact structure

  • Detailed instruction manual






Introduction

The phenomenon of Newton's rings, named after Isaac Newton, is an interference pattern caused by the reflection of light between two surfaces - a spherical surface and an adjacent flat surface. When viewed with monochromatic light, it appears as a series of concentric, alternating light and dark rings centered at the point of contact between the two surfaces. Using this apparatus, students can observe the phenomenon of equal-thickness interference. By measuring interference fringe separation, the radius of curvature of the spherical surface can be calculated.


Specifications

Description Specifications
Minimum Division of Reading Drum 0.01 mm
Magnification 20x, (1x, f = 38 mm for Objective; 20x, f = 16.6 mm for Eyepiece)
Working Distance 76 mm
View Field 10 mm
Measurement Range of Reticle 8 mm
Measurement Accuracy 0.01 mm
Sodium Lamp 15 ± 5 V AC, 20 W
Radius of Curvature of Newton's Ring 868.5 mm
Beam Splitter 5:5


Part List

Description Qty
Sodium lamp (LLE-2) 1
Reading microscope 1
Newton's ring assembly (SZ-37B) 1
Beam splitter 1
Focusing knob 1


LEOK-30 Newton's Ring-1.jpg

Schematic of a lens and a flat plate used to form Newton’s rings

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