You are at the bottom of a swimming pool (index refraction = 1.33). What is the critical angle into the air as you look

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You are at the bottom of a swimming pool (index refraction =1.33). What is the critical angle into the air as you look out?
Group of answer choices
1.16°
15°
48.8°
87.4°
65.2°
The index of refraction of a certain type glass is measured tobe 1.78. How long does it take light to travel 1.2 m while in thatglass?
Group of answer choices
0.712 × 10-8 s
0.26 × 10-8 s
0.10 × 10-8 s
0.50 × 10-8 s
0.40 × 10-8 s
A pink flamingo is under close investigation. It placed 15 cmfrom a convex lens with a focal length of magnitude 30 cm. What isthe magnification factor of the lens?
Group of answer choices
-3.0
2.0
1.5
0.50
-1.5