Which of the following statements apply to the photoelectric effect? 1) wave theory accurately describes the photoelectric effect. 2) quantum theory accurately describes the photoelectric effect. 3) the photoelectric effects can be explained in the same way that diffraction and interference are explained. 4) the photoelectric effect offers evidence of the wave nature of light. 5) the photoelectric effect demonstrates that photons are small enough to interact with individual electrons.

correct ans is (2)

The classical model of light depicts diffraction and interference. Quantum theory precisely depicts the photoelectric impact since when Einstein initially proposed the utilization of light quanta to clarify the photoelectric impact. This idea is formalized in the quantum theory of radiation. The photoelectric effect explain, If you  light of sufficiently high energy on to a metal, electrons will be emitted from the metal. Light beneath a specific threshold frequency, regardless of how extreme, won't make any electrons be radiated. Light over the threshold frequency, regardless of whether it's not extremely intense, will dependably motivation electrons to be transmitted.

Given data:

refractive index of glass (n₁) = 1.50 ,

refractive index of air (n₂) = 1.00,

determine the critical angle of the glass (θₙ) = ?

Critical angle is defined as "it is the incidence angle, beyond which total internal reflection will occurs".

According to snell's law critical angle is given by the equation

Assume light travels from higher refractive index (glass) to lower refractive index (air)

Critical angle,  

                                  sin θc =  (n₂/n₁)            n₁ > n₂

                                        θc =  sin ⁻¹(1.00/1.50)

                                       θc  = 41.8⁰

The critical angle of the glass is 41.8⁰