______________event is specifically commemorated on the International Day of Light?

(a) The development of fiber optics

(b) The invention of the microscope

(c) The discovery of the speed of light

(d) Theodore Maiman’s successful operation of the laser

Ans.(d)

Sol. The International Day of Light is observed on May 16 every year to commemorate Theodore Maiman’s successful operation of the laser in 1960.