Question 12 (2 points) An aircraft measures its altitude by bouncing radio signals off the Earth...

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Question 12 (2 points) An aircraft measures its altitude by bouncing radio signals off the Earth and measuring the time it takes for the signal to return. If it takes 68 s for the signal to return, what is the altitude of the aircraft? Your Answer: Answer units Add attachments to support your work Question 13 (4 points) A diffraction grating with a width of 2.5 cm contains 4000 slits. At what angle, to the nearest tenth of a degree, will the third maximum be from the central maximum when light of wavelength 510 nm is incident on the grating? Your Answer: Answer units Add attachments to support your work Question 14 (3 points) Waves need a medium to travel through. Describe how it is possible for electromagnetic waves to propagate through a vacuum, such as space. Question 12 (2 points) An aircraft measures its altitude by bouncing radio signals off the Earth and measuring the time it takes for the signal to return. If it takes 68 s for the signal to return, what is the altitude of the aircraft? Your Answer: Answer units Add attachments to support your work Question 13 (4 points) A diffraction grating with a width of 2.5 cm contains 4000 slits. At what angle, to the nearest tenth of a degree, will the third maximum be from the central maximum when light of wavelength 510 nm is incident on the grating? Your Answer: Answer units Add attachments to support your work Question 14 (3 points) Waves need a medium to travel through. Describe how it is possible for electromagnetic waves to propagate through a vacuum, such as space.