An insulated lamp bulb is on the bottom of a swimming pool at a point 2.5 m from a wall; the pool is 2.5 m deep and filled to the top with water (n = 4/3). at what angle is light refracted out of the water at the edge of the pool? a. 70.5° b. 25.1° c. 40.9° d. 30.4° e. 64.8°

option A

Explanation:

given,

lamp position from pool wall = 2.5 m

height of the pool = 2.5 m

now,

from the triangle

θ = i = 45°

using Snell's law

n₁ sin i = n₂ sin r

n₁ =4/3     n₂ = 1  

now,

r = sin⁻¹(0.9428)

r = 70.5°

hence, the correct answer is option A

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

a sonic boom is a loud boom that breaks the sound barrier

explanation: