\fpoints each). D Question 7 7.5 pts Consider a single slit. When the slit width is doubled, what happens to the width of the central maximum in the diffraction pattern? O No interference pattern occurs unless there are two slits. It quadruples O It doubles O It halve'sD Question 8 7.5 pts In order to produce an image double the size of an object with a converging lens of focal length f, what object distance should be used? O f/3 O 3f/2 O 2f O f/2 O 2f/3Question 9 7.5 pts When light goes from a material with a lower index of refraction n1 into a material with a higher index of refraction n2 with an angle of incidence of 30.0%, which of the following is true? O Total internal reflection may occur. O Both the angle of refraction is less than 30.0 degrees AND total internal reflection may occur are true. O The angle of refraction is more than 30.0 degrees. O Both the angle of refraction is more than 30.0 degrees AND total internal reflection may occur are true. The angle of refraction is less than 30.0 degrees. Next