11.5 ст -28.0 cm:
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Two plane mirrors intersect at right angles. A laser beam strikes the first of them at a point 11.5 cm from their point of intersection, as shown in Fig. For what angle of incidence at the first mirror will this ray strike the midpoint of the second mirror (which is 28.0 cm long) after reflecting from the first mirror?


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- A ray of light hits a flat mirror with an incident angle of 19.03 degrees. What angle does it reflect at?The figure shows a star shaped object in front of a concave mirror. One light ray from the top of the star moves parallel to the principle axis (small-dotted line) and is reflected as shown in the direction indicated by the arrows. Four spots, (a), (b), (c), and (d), are marked along the principle axis. There is equal spacing between the object, the dots, and the mirror. Approximately where is the image of this star located? ... (a) (b) (c) (d) A between (b) and (c) between (a) and (b) between the mirror and (d) to the right of (d) 6.A mirror hangs 1.60 m above the floor on a vertical wall. A ray of sunlight, reflected off the mirror, forms a spot on the floor 1.14 m from the wall. Later in the day, the spot has moved to a point 2.50 m from the wall. (a) What is the change in the angle of elevation of the Sun, between the two observations? °(b) What time of day were these observations made? morning or afternoon
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