Brasch, Nicolas.

Why do shadows lengthen? : and other shadowy questions / Nicolas Brasch. - Markham, Ont. : Scholastic, 2007. - 16 p. : col. ill. ;23 cm. - Why is it so? Pan Canadian Science Place .

ISBN: 9780779174195 (pbk.) 0779174194 (pbk.)

Subjects--Topical Terms:
Light--Wave-length--Miscellanea.
Wave theory of light--Miscellanea.
Light--Miscellanea.
Science--Study and teaching (Primary)