Question

Which of the following is used for spread radius?

(a) blur

(b) spread

(c) color

(d) v-offset

The question was posed to me in an international level competition.

Enquiry is from Shadowy Styles, Multiple Backgrounds, CSS Pop-Ups & Menus topic in chapter Layout & Images of CSS

Answer 1

The correct answer is (b) spread

For explanation I would say: blur is an optional value, it sets the spread radius. A positive value increases the size of the shadow, a negative value decreases the size of the shadow. For blur radius we set the value blur, the higher the number, the more blurred the shadow will be spread.