Times, Sunday Times (2010) His caustic comments make wonderful copy, of course. Times, Sunday Times (2009) But over ten years, audiences have become less able to accept her caustic humour. The Sun (2010) Doctors feared she would die from horrific injuries caused by the 98 per cent strength caustic soda.
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.
Formulae. 1  Wavelength shift: = new-rest. rest is the wavelength measured if the object is at rest and new is the wavelength measured for the moving object. 2  Doppler effect: = rest Ã Vradial/c, where Vradial is the object's speed along the line of sight and c is the speed of light.