Hi!
When I printed out the Assignment on Light waves this morning, I didn't examine if it were clear enough. And I have already distributed all the copies to all of you before I could realize that it was NOT really good (blurred, in other words). Sorry for that, guys.
Hence, I am uploading the screen shot of the original copy.
*Hint for question 3: consider the speed of laser light to be a constant (300,000,000 m/s) and that the distance between the moon and the Earth is 384,403,000 m.
*In question no. 4, c stands for the speed of light, f for frequency, and the symbol next to letter "f" in the equation is the greek letter lambda, notation for wavelength.
*In question no. 5, nm is a shorthand notation for nanometer.
Time in Manila, Philippines 
