S. No.

Required item

Utility

1

Mercury vapor lamp

Light source containing different colors

2

Grating

Resolving source light into different wavelengths with high resolution

3

Pinch cork

To adjust the water level

4

Collimator (lens + slit)

To produce parallel beam of light

5

Telescope

Used for observing grating

6

Goniometer

Turntable holding the equipment to change angle with precision