Q1. Light from a He-Ne laser ( lambda = 632.8 nm ) strikes a pair of slits at normal incidence, forming a double-slit interference pattern on a screen located 1.30 m from the slits. The interference pattern can be observed on the screen. What is the slit separation?
Q2. A dentist uses a small mirror with a radius of 36 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 16 mm from the tooth, what is the magnification of an image?
Q3. A tuning fork vibrating at 594 Hz falls from rest and accelerates at 9.8 m/s
How far below the point of release is the tuning fork when waves of frequency 571 Hz reach the release point? The speed of sound in air is 337 m/s.
Explain answer in units of m.