Kodagoda, A.N.; Jayatilleke, K.P.S.; Abewickrama, S.S.
(Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2018-02-15)
A lamp was designed and constructed arranging number of coloured LEDs
to produce a monochromatic light beam comparable to low pressure Na
lamps with light intensity that are used in physical optics experiments. It
comprises ...