If you want to see your full image in a plane mirror regardless of how far you are from it, the minimum size of the mirror you need is one-half of your height. However, the base of the
mirror should be positioned at one-half the distance between your feet and your eyes.

Yoginee is 4feet 11inches tall. What minimum size of a plane mirror in meters does she need
to see her full self?​

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light