Question

Problem 23.48 It's nighttime, and you've dropped your goggles into a 2.8-m- deep swimming pool. If you hold a laser pointer 1.2 m above the edge of the pool, you can illuminate the goggles if the laser beam enters the water 2.2 m from the edge. Part A How far are the goggles from the edge of the pool? Express your answer to two significant figures and include the appropriate units O Å R O ? d= Value Units Submit Request Answer Provide Feedback

Answer 1

Solution Given esinto deep mo above air 2.2m water later Googles in to deep 1.2m i Swimming pool 2-8 m laser printer above 1.2 m beam 3.0m deep laser beam enter the water 22. 2m Nao figure tanda perbendicular 1.2 2.2 Вере to da tant 1.212.2 * 28.61 Now opz go- 28.61 ² 61.380 Snell laws using ni sinoi = na sinor Ora sint (nising Sintesin 61.38) or sint (IX Sin 61.38 1.33 air refractive Index 21 and water refractive index = 1.33 ora sint (1x 0.8778 sint 0.660 1.33 Or 2 41.2907 2 Sintesinghe m nz

from triangle BCD tenora BC/2.8 BC 2 2-8 tan or loo Subtituting value or 2 41.290 BC a 2.8 tan 41.29 Bc2 2.46 m de Now the distance of the googles from the edge of the pool sth Gold I da 2.46+2.2 & 4.66M) are