DIRECT VISION SPECTROSCOPE
With adjustable slit at one end, and eyepiece mounted on a draw tube at the other end. A composite, three element, trapezoidal prism used for dispersion. Draw tube can be adjusted to give a sharp spectrum. A bright and clear spectrum of light, approx. 16mm wide is visible. Housed in polished wooden case.
No-5309/27, Punjabi Mohalla, Ambala Cantt, Haryana, 133001, India