Polarization | Old is Gold | Class XII 

Polarization Short answers question 1. Can sounds waves be polarized? Explain. 2. Is polarization possible for longitudinal waves? Why? 3. Light waves can be polarized. What about sound waves? Explain. 4. What is polarizing angle? Does it depend on the wavelength of light? 5. The polarizing angle for a transparent medium is 600. What is the refractive index of the […]

Diffraction | Old is Gold | Class XII 

Diffraction 1. Diffraction grating is better than a two –slit set up for measuring the wave length of monochromic light. Explain. 2. What is diffraction of light? 3. Radio waves diffract around building but light waves do not. Why? 4. The diffraction of sound waves is more evident in daily experience than that of light waves, why? 5. Describe what […]

Interference | Old is Gold | Class XII 

Interference Short Answer Questions 1. Can two independent sources of light produce interference? 2. Why have the two sources of light to be close to each other for the production of good interference pattern? 3. Distinguish between interference and diffraction. What do you understand by coherent sources? 4. In young’s double slit experiment, how is the fringe width altered […]

Nature and Propagation of Light | Old is Gold | Class XII 

Nature and Propagation of Light Short 1. Differentiate between a plane wave front and a spherical wave front. 2. Which parameter of light does not change on refraction? 3. Define accommodation of eye and its near point. 4.  What is Huygens principle? 5. When monochromatic light incidents on a surface, the reflected and refracted wave will have same frequency. Why? […]

Acoustic Phenomena | Old is Gold | Class XII 

Acoustic Phenomena Short 1. How are beats produced? What is beat frequency? 2. What are ultrasonic and infrasonic? 3. Distinguish between ultrasonic and supersonics. 4. How it is that one can recognize a friend from his voice without seeing him? 5. Why is it roaring of a lion different than the sound of a mosquito? 6. What do you mean by […]

Wave in pipes and strings | Old is Gold | Class XII 

Wave in pipes and strings Short 1. The frequency of fundamental note of an open organ pipe is double than for closed pipe of same length. Why? 2. Differentiate between forced vibration and free vibration. 3. The frequency of organ pipe changes with temperature. Does it increases with increase in temperature? 4. Explain why soldiers are ordered to break […]

Mechanical Waves | Old is Gold | Class XII 

Mechanical Waves Short 1. Why sound made/produced at a distance can be heard distinctly at night than in the day time? 2. Is velocity of sound more in damp air or in dry day? 3. Why sounds are heard better on a wet day than on a dry day? 4. Do sound waves need a medium to travel from […]

Wave Motion | Old is Gold | Class XII 

Wave motion Short 1. How are stationary waves formed? 2. If you are moving on the moon surface, can you hear the cracking sound behind you? Explain. 3. Do sound waves undergo reflection, refraction and polarization phenomena? Explain. 4. Which type of wave propagates in liquid, explain. 5. Longitudinal waves cannot be polarized. Why? 6. Distinguish between light waves and sound […]