The two mirrors in the figure below meet at a right angle. The beam of light in the vertical plane P strikes mirror 1 at 0, = 36.6° as shown. Light beam Mirror 2 1.25 m Mirror 1 (a) Determine the distance the reflected light beam travels before striking mirror 2. m (b) In what direction does the light beam travel after being reflected from mirror 2? • above the horizontal

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Parallel light rays cross interfaces from medium 1 into medium 2 and then into medium 3. What can we say about the relative sizes of the index of refraction of these media? a) n2 > n3 > n1 b) n2 > n1 > n3 c) n3 > n2 > n1 d) n3 > n1 > n2

Corrective Lenses Conceptual Questions The near point (the smallest distance at which an object can be seen clearly) and the far point (the largest distance at which an object can be seen clearly) are measured for six different people. Avishka Berenice Chadwick Danya Edouard Francesca near point far point (cm) (cm) 40 30 25 25 80 50 ∞ 300 500 ∞ 200 ∞ Part A Which, if any, of these people are nearsighted (myopic)? Select all that apply. ► View Available Hint(s) оооо 00 Avishka Berenice Chadwick Danya Edouard ооо Francesca Submit Part B Which, if any, of these people require bifocals to correct their vision? Select all that apply. ► View Available Hint(s) Avishka Berenice Chadwick Danya Edouard Francesca

solve and explain each step

I Review I Constants I Periodic Table • Part A A woman can produce sharp images on her retina only of objects that are from 150 cm to 25 cm from her eyes. Indicate the type of vision problem she has. O She is nearsighted. O She is farsighted. Submit Request Answer Part B Determine the focal length of eyeglass lenses that will correct her problem. Express your answer with the appropriate units.

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Part A Constants | Periodic Table Suppose you are 99 cm from a plane mirror. What area of the mirror is used to reflect the rays entering one eye from a point on the tip of your nose if your pupil diameter is 4.7 mm ? Express your answer using two significant figures. A = V ΑΣΦ Submit Previous Answers Request Answer × Incorrect; Try Again; 4 attempts remaining Provide Feedback m² Next >

Homework After a long day of driving you take a late-night swim in a motel swimming pool. When you go to your room, you realize that you have lost your room key in the pool. You borrow a powerful flashlight and walk around the pool, shining the light into it. The light shines on the key, which is lying on the bottom of the pool, when the flashlight is held 1.2m above the water surface and is directed at the surface a horizontal distance of 1.5m from the edge. If the water here is 4m deep, how far is the key from the edge of the pool? 1.2 m K1.5 m- = 1.33 water 4.0 m

QUESTION 2 A light ray enters a rectangular block of plastic at an angle 01 = 45.0° and emerges at an angle 02 = 76.0°, as shown in Figure 4. (a) Determine the index of refraction of the plastic. (b) If the light ray enters the plastic at a point L = 50.0 cm from the bottom edge, how long does it take the light ray to travel through the plastic? FIGURE 4