Choose the incorrect statement. 1. The velocity of light in a vacuum is larger than the velocity of light in glass. 2. The velocity of light in a vacuum does not depend on the wavelength of light. 3. The velocity of light in a vacuum is the same as the velocity of x-ray in a vacuum. 4. The velocity of light is constant irrespective of the medium through which it is traveling. 5. The velocity of light is independent of the velocity of the observer and the source.

You are the coordinator for a program that is going to take place at night in a rectangular amphitheater in the mountains. you will have no access to any electricity, but you must be able to illuminate the entire grounds. you know the intensity of the light from a lantern varies inversely as the square of the distance from the lantern. suppose the intensity is 90 when the distance is 5 m. a. write an equation to model the situation. b. solve for the constant of variation. c. write the equation to model the situation using the constant () of variation. d. you have been given lanterns with 40 light intensity. use your equation to solve for the distance from the lantern. e. you need to illuminate 225 km. how many meters do you need to light? f. how many lanterns will you need?