De Broglie suggested that if waves (photons) could behave as particles, as demonstrated by the photoelectric effect, then the converse, namely that particles could behave as waves, should be true. He associated a wavelength λ to a particle with momentum p using Planck's constant as the constant of proportionality: (4.5.1) λ = h p

An angle's measurement in radians is numerically equal to the length of a corresponding arc of a unit circle. One radian is equal to 180/π (~57.296) degrees. History/origin: Measuring angles in terms of arc length has been used by mathematicians since as early as the year 1400. The concept of the radian specifically however, is credited to.

Expert Answer. 2-) Benzene and Toluene form nearly ideal solutions. Consider an equirsalar solution of benzene and toluene at 60∘C. The solution is boiled by reducing the extarnal pressure below the vapour pressure. When the external pressure is reduced to 525 Torr, the solution starts to boil. At 60∘C, the vapour pressure of pure benzene.