Description

The equipment has predefined position of components and so designed as to conduct the experiments rapidly and with ease. With standard equipment and some additional accessories, the following experiments can be performed:

• Determination of wavelength of laser light
• Determination of the refractive index of glass
• Determination of the refractive index of air

The standard equipment includes:

• Heavy Stable Base
• Mounted Beam Splitter
• Mounted Compensator
• Mounted Moveable Mirror
• Three- point Adjustable Mirror
• Beam Expander Lens
• Viewing Screen
• Diffuser Plate

Additional equipment required

• Laser
• Sodium Vapour Lamp

Component Specifications

Adjustable Mirror: 3 cm in diameter; 0.6 cm thick; flat to ¼ wavelength on both sides; coated on one side for 80% reflectance and 20% transmission. It is mounted on a Kinematic Mount for adjustment in X-Y axis.

Movable Mirror: 3 cm in diameter; 0.6 cm thick; flat to 1/4 wavelength on both sides; coated on one side for 80% reflectance and 20% transmission. The mirror travel is controlled by a micrometer having precise measurement and virtually no back lash.

Beam-Splitter: 3 cm in diameter; 0.6 cm thick, flat to 1/4 wavelength on both sides; coated on one side for 50% reflectance and 50% transmission.

Compensator: Identical to the beam-splitter, but uncoated.

Micrometer: The micrometer uses a 1:20 reduction lever such that one division on the micrometer corresponds to 0.5 μm travel of mirror. The full travel of the mirror is 1.25mm. The reading through full distance of travel is linear to within 1.5%.