ANSWER ALL OF THE FOLLOWING QUESTIONS A. Choose the letter that you think best answers the question. 1. Which of the following describes Huygen's Principle? a. Every point on a wavefront acts as a source of lots of secondary spherical wavelets, which can therefore interfere with each other. b. A wave can produce an interference pattern. C. The angle of incidence is equal to the angle of reflection. . The speed of light is constant in every direction. 2. What is a monochromatic wave? a. A wave of a single frequency C. A wave of double frequency b. A wave of half frequency d. wave of 4 frequency 3. What are the two types of interference wave? a. diffraction and construction c. construction and diffuser b. constructive and destructive d. destructive and diffraction 4. From the double-slit, what are the quantities that should be measured? a. Slit separation c.. slit-to-screen separation Fringe separation d. all of the above 5. What do you call the interference pattern of light and dark bands on the screen? a. Graphical pattern c. light spectrum b. Line spectrum d.. fringes B. What comes into your mind if you read or hear the word "INTERFERENCE" Give at least three (3) words. C. Solve the problem with complete solutions Solve the problem below with complete solution: 1. A light source emits visible light of two wavelengths: 2 = 400 nm and 2' = 500 nm. The source is used in a double-slit interference experiment in which L = 1.2 m and d = 0.030 mm. Find the separation between the third- order bright fringes