Unit 6 Test

1. An object is placed 18 cm from a concave mirror with focal length 12 cm. Determine the image distance and magnification.
2. Light passes from air (n=1) into glass (n=1.5) at an angle of 40°. Calculate the angle of refraction.
3. A converging lens produces a real image twice the size of the object. If the object is 15 cm from the lens, find the image distance and focal length.
4. Calculate the angle for the first minimum in single-slit diffraction if the slit width is 0.12 mm and wavelength is 500 nm.
5. Two slits are separated by 0.25 mm, and the screen is 1.5 m away. Light of wavelength 600 nm produces interference. Find the distance between the central maximum and the third bright fringe.
6. Sketch ray diagrams for a convex lens forming a virtual, upright image.
7. Explain how changing the wavelength of light affects diffraction and interference patterns.
8. Determine the image position and magnification for an object placed at 2f from a converging lens with f = 10 cm.
9. Combine diffraction and interference effects to explain patterns observed in a double-slit experiment with finite slit width.
10. Describe the systematic approach to solving complex lens and mirror problems, highlighting key strategies.