Viii. The block of glass (n = 1.5) shown in fig 4.15 is surrounded by air. A ray of light enters the block at its left-hand face with incident angle 0, and reemerges into the air from the
right-hand face directed parallel to the block's base. Determine thatre one​

Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented.b)scientists had not completely finalized their results, which took 30 years.c)cigarettes were cheaply available and media channels were very inefficient.d)cigarette manufacturers were trying hard to bring an alternative into the market

Could someone me find the answer to this problem.

Decreased sensitivity to an unchanging stimulus is known as