At 60 you see five reflections four straight and one composite.
The angel between these mirrors is 90, At 72 you see 4 complete reflections. An angle less than 90 shows two straight reflections and two partial reflections. The scalar projection equations for $u'_x$ are the same as the scalar projection equations for $u_x$, for the same reasons, except that they use $\theta'_i$ and $\theta'_r$ instead of $\theta_i$ and $\theta_r$. a) A,B b) A,C c) A,D d) B,C 2) A ray of light is incident towards a plane mirror at an angle of 30-degrees with the mirror surface. When a mirror rotates through an angle a beam of light reflected from it will rotate through an angle of 2. Two mirrors at a right angle (90) show two complete reflections and one composite reflection. Now suppose the mirror is moving with velocity $\overline v$ in the frame $\Sigma$, and let the frame of the mirror be $\Sigma'$. You must answer one question from each Question Group to complete the mission. The mission consists of 34 questions organized into 9 Question Groups. Obviously if it is at rest the canonical law of reflection $\theta_i=\theta_r$ holds. Mission RM1 pertains to the law of reflection, the terminology associated with it, and its use in predicting the value of the angle of reflection. Let $S$ be a perfectly reflecting mirrror. Given below are the different types of mirrors: Plain Mirror: When an image is formed in a plane mirror, the reflected image is in its normal proportion but it is reversed from left to right. Angle of Refraction: The angle at which the refraction ray occurs. I am following a training course and came across this proof, from my colleague, that the ordinary law of reflection $\theta_i = \theta_r$ does not hold in relativity: Angle of Reflection: The angle at which the reflected ray occurs.
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