You send a beam of light from a material with index of refraction 1.21 into an unknown material. in order to identify this material, you determine its index of refraction by measuring the angles of incidence and refraction for which you find the values 41.9° and 37.3° , respectively. what is the index of refraction of the unknown material?

Which of the following statements are true for an isothermal process? check all that apply. - during an isothermal process, the work done by the gas equals the heat added to the gas. - during an isothermal process, the internal energy of the system changes. - an isothermal process is carried out at constant temperature. - an isothermal process is carried out at constant pressure. - an isothermal process is carried out at constant volume.