Guinness World Records 2013 Honorees Include Tallest Cat, Tallest Dog And Tallest Donkey. This is a bittersweet time for Debby Maraspini. The 2013 edition of Guinness World Records just came out and her beloved cat, Savannah Islands Trouble -- Trouble for short -- is in the book as the tallest cat ever, with a height of 19 inches.
Refraction is the change in direction of waves that occurs when waves travel from one medium to another. Refraction is always accompanied by a wavelength and speed change. Diffraction is the bending of waves around obstacles and openings. The amount of diffraction increases with increasing wavelength.
Refraction is the bending of a wave when it enters a medium where its speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media.