<span>Answer:
As the ray is travelling from denser to rarer medium,
Therefore sin i / sin r = 1 / RI
= Sin 90 / Sin i = RI (Reciprocal)(Sin 90 because for critical angle Sin r= 90)
= 1 / Sin i = 3/2
= Sin i = 0.667
Now converting this value to degrees
It becomes Sin 42.
Therefore the critical angle is 42.
42 degrees = 0.733038286 radians</span>
Absolute pressure at the bottom of the lake = pressure due to water height + Air pressure = Density of water*gravitational acceleration* height + 101.3 kPa
Therefore,
Absolute pressure = 1/1000(1*10^3*9.81*29.1) + 101.3 = 285.471+101.3 = 386.771 kPa
Answer:
15 miles
Explanation:
Speed of both bicyclists is 10 mph
Speed of fly is 15 mph
Time they both will meet at is t
Distance they are apart is 20 miles
Distance = Speed×Time
The time after which they will meet is 1 hour.
The distance traveled by the fly in hour is
The total distance fly covered is 15 miles
Answer:
The electromagnetic theory of light , that's the answer