CAN U ANSWER THESE QUESTIONS
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1 Total internal reflection, in physics, complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle.
2 rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. ... Rainbows caused by sunlight always appear in the section of sky directly opposite the Sun.
4 As light from a star races through our atmosphere, it bounces and bumps through the different layers, bending the light before you see it. Since the hot and cold layers of air keep moving, the bending of the light changes too, which causes the star's appearance to wobble or twinkle.
5 Atmospheric refraction is the deviation of light or other electromagnetic wave from a straight line as it passes through the atmosphere due to the variation in air density as a function of height. This refraction is due to the velocity of light through air decreasing with increased density.
6. Planets are not a source of light. Instead, they reflect low intensity light reaching them. ... As the planets are closer, planets appear larger in comparison to the stars. Hence, the shift is not enough for the planets to twinkle.