B) Light slows down when it passes into a denser medium.
Answer:
option D
Explanation:
given,

increase the intensity by factor of 9
I₁ = I₀
I₂ = 9 I₀
now,




A₂ = 3 A₁
hence, amplitude increase with the factor of 3
so, the correct answer is option D
Answer:
I think D it could maybe B
Hydrogen gas is harmless to your feet so since you don’t need protection against it that seems the best answer.
Answer:
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Haha Rick rolled you
Explanation:
jk my favourite song is Thunder, Despacito