Activity 2. Critical Thinking Directions: Explain the following using the concept of total internal reflection. 1. Why do diamonds shine? 2. Is it possible that total internal reflection plays a role in rainbows? Explain in terms of indices of refraction and angles. 3. A ring with a colorless gemstone is dropped into water. The gemstone becomes invisible when submerged. Can it be a diamond? Explain. Activity 3. Problem Solving Directions: Solve the following problems. Show your complete solution. A ray of light, emitted beneath the surface of an unknown liquid with air above it, undergoes total internal reflection. What is the index of refraction for the liquid and its likely identification if it makes a critical angle of 41.78 degrees?|||. TRUE UR FALSE. Write TRUE if the statement is correct and Write FALSE if the statement is incorrect. 1. AC can come in a number of forms. as long as the voltage and current are alternating. 2. Most homes are wired for DC. 3. AC is used to deliver power to houses, offlces and buildings. 4. The most common type of AC is the sine wave. 5. Square waves are found in sound synthesis and are useful for testing linear electronics like Amplifiers. 6. Total internal reflection took place when the ray of light travels from a less dense medium Into a more dense medium. 7". Optical flhers have revolutionized the speed with which signals are transferred , not only across cities but also countries and continents maklng telecommunications one of the fastest modes of information transfer. El. Mirage is an example of total internal reflection which occurs due to atmospheric refraction. 9. When the incident ray falls on the cladding. it suffers total internal reflection as the angle Formed by the ray is lesser than the critical angle. 1 D. Total internal reflection is a phenomenon which occurs when the light rays travel from a more optically denser medium to a less optically denser medium. V. Problem Solving. Read and analyze carefully the given problems. Show your complete solution in each problem (5 points each). 1. Calculate the wavelength of a photon that has a frequency of 2.5 x 10 * Hz. 2. What is the frequency of a photon that has a wavelength of 1.5 x 10 m