r of Earth: 6371 km David Lyu Distance from the center of Earth to moon : 572236 km Advanced Physics 11 r of moon : 1737.5km r of sun: 695700 km Shadows Worksheet Distance from the center of Earth to sun: 15132 287 7 Km 1. The darkest region of a shadow (where no light is received directly from the source) is called the Umbra 2. Every shadow has a penumbra, but not all shadows have an umbra. (T/F) Justify your answer. F, because shadows all have an umbra and a penumbra. 3. When the source is closer to the obstruction than the screen, the shadow will be a. Bigger than the obstruction b. Smaller than the obstruction . The same size as the obstruction (d.) All of the above are possible 4. The Sun is 149.6 million km away from the earth and has a radius of 696 340 km. The moon has a radius of 1737 km and is 384 400 km. During a total solar eclipse, what is the size of the Umbra created by the moon? Although you will not be able to draw this to scale, draw a diagram to help solve this problem. 695 700 - 17375- 6371 151322877 572236