Distribution of energy in the spectrum of a black body can be correctly represented by

As compared to a person with white skin,a person with black skin will experience:

Which of the following is closest to a black body?

When we enter an air-conditioned room,we feel cold. This can be explained by:

$A$ body is said to be opaque to the radiation if ($a$,$r$,and $t$ are the coefficients of absorption,reflection,and transmission,respectively).

There is a rough black spot on a polished metallic plate. It is heated up to $1400 K$ approximately and then at once taken into a dark room. Which of the following statements is true?