Physics Questions and Answers Physics Questions and Answers PHYSICS- VERY SHORT QUESTIONS [1 MARKS] What is simple harmonic motion and its various types? Simple harmonic motion is a periodic motion where acceleration is proportional to displacement and directed toward the mean position. Types: Linear SHM and Angular SHM. A wave of frequency 30Khz travelling through water with the speed of 300 m/s. What will be its wavelength? Wavelength = 𝜆 = 𝑣 𝑓 = 300 30 , 000 = 0.01 m λ= f v = 30,000 300 =0.01m. Sound is longitudinal wave whereas light is transverse wave, why? Sound oscillates parallel to wave propagation; light oscillates perpendicular to it. Name any three phenomena that explain the wave nature of light. Diffraction, interference, polarization. What is the basic phenomenon behind laser emission? Stimulated emission of radiation. What would be the path differ...