Page 65 - Science Class 6 Times Publication

b. Draw the diagrams of any ve articial sources of light.

Project Work

Collect different substances such as water, alcohol, oil, plastic,
glass, clay, bricks, greased paper, book and cardboard-sheet.
Observe whether light passes completely, partially or not at all.
Then classify these substances as transparent, translucent and
opaque substances.

Times' Crucial Science and Environment 61 Book 6