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  1. ...pi radians when light is reflected on the water-SiO interface . Hence, dark fringes that observed previously now become bright...

  2. ...ii)&(iii) Let Ti and Tf be the temperatures at the interface and external surface of the walls. Hence, rate of heat flow per unit area...

  3. ...medium, there is a phase change of pi radians (half a wavelength) on both interfaces . Hence, we have, for a bright fringe to occur, 2nt = m入 where n is the...

  4. ... when the light ray is under total internal refletion on the cladding-core interface . The angle of incident is the critical angle c, say. Hence, by...

  5. You have already got the refractive index for the glass plate, n(g) = 1.7219 For no refraction in water, total internal reflection occurs. Hence, 1.7219.sin(c) = 1.333.sin(90) where c is the incident angle (critical angle) where total internal refraction occurs. sin(c) = 1.333.sin(90)/1.7219...

  6. 1. Place the camera at an angle to the wall mirror, such that light coming from the flash is reflected to the other side. 2. (a) Focus the camera at 3 metres behind the mirror, i.e. 6 metres from the man where the position of his image is located...

  7. 1a) Should be from B to A, since the time needed for sound to travel from B to A is shorter than that for travelling from A to B. b, c) Let c and v be the sound velocity in air and wind velocity component along the line joining...

  8. ...conneceted in series (whether there is a metal plate present in the air-dielectirc interface is immaterial). Thus the capacitance C1 of the capacitor with air as...

  9. 1a) Let c be the critical angle for the glass-water interface , then sin c = 1.33/1.6 = 0.83125 c = 56.23 b) No, since total internal reflection...

  10. ...quot;Special sites in the material such as surfaces,internal interfaces , dislocations, etc. can act to“catalyze” nucleation by effectively ...