Q. A photon traveling in the positive x-direction collides with a stationary free electron. The incident photon has a wavelength of 0.0310 nm. Post-collision, the electron moves at an angle 𝛼 below the positive x-axis, and the photon deflects at an angle 𝜃 = 66.3° above the positive x-axis. A) Calculate the angle 𝛼 (in degrees). B) Compute the velocity of the electron (in m/s). Solution:
Motion in Straight Line: Motion in straight line is defined as motion in one dimension (1-D). It is also known as linear motion. It can be participated in two parts - (i) uniform linear motion and (ii) non-uniform linear motion Uniform Linear Motion: In this motion a body covers equal distance in equal time intervals i.e. velocity along the path is constant. In this motion a body moves with a constant acceleration. Non-uniform Linear Motion: In this motion a body moves with a variable velocity in a given interval of time. Equation of Motion with constant Acceleration: Consider that a particle has constant acceleration 'a'. It's initial velocity is 'u' and final velocity is 'v' after 't' time. Now acceleration can be written as: dv/dt = a Particle covers 's' distance or displacement (since particle is moving along the straight line) in time 't'. From 1st equation- write equation 1st again- Displacement of Particle in nth second: ...



Good concept
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