An erecting telescope is formed using three lenses, a 60 centimeter focal length objective lens, a 20 centimeter inverting lens, and a 3 centimeter focal length eyepiece lens. A compound microscope is formed using two lenses, an 1 centimeter focal length lens and a 4 centimeter focal length lens. The two lenses are fixed twenty centimeters apart. Coherent light of wavelength 620 nanometers is incident on a double slit. An interference pattern forms on a screen 2 meters from the slits.
White light is incident on the diffraction grating.
A third order maximum is located 60 o from the central maximum. What is the wavelength of the incident light. Coherent light of wavelength 620 nanometers is incident on a single slit. The slit width is .2 mm. A diffraction pattern forms on a screen 3 meters from the slits.