Question 21 Use the following information to answer the next question. Not yet answered Marked out of An X-ray photon that has a wavelength of 2.000 x 10-10 m collides with a stationary electron. 5.0 Flag question Stationary electron Photon incident The scattered X-ray photon, which has a wavelength of 5.068 x 10-10 m, returns along the in the initial path Scattered electron Scattered photon Verify that this collision is elastic. Marks will be awarded based on the relationships among the two physics principles* that you state, the formulas that you state, the substitutions that you show, and your final answer. * The physics principles are given on the data sheet.Question 7 Visible light that has a wavelength of 6.50 x 10" m in air, is directed into obsidian. The index of refraction of obsidian 1.76. The wavelength Not yet . of this light inside the obsidian expressed in scientific notation, answered is a.bc x 10-7 m. Record a, b and c in the space below Marked out of 1.0 Flag questionQuestion 9 At what distance above this page would a convex magnifying lens that has a focal length of 7.00 cm have to be held for the image of the Not yet letters to appear upright and 3 times as tall? answered Marked out of Select one: 1.0 O a. 4.67 cm Flag question O b. 2.33 cm O c. 9.33 cm O d. 10.5 cm