Ex.15.4 Q1 Visualising Solid Shapes - NCERT Maths Class 7
A bulb is kept burning just right above the following solids. Name the shape of the shadows obtained in each case. Attempt to give a rough sketch of the shadow. (You may try to experiment first and then answer these questions).
What is known?
What is unknown?
Shape of the shadow obtain in each case.
A spherical object gives a circular shape shadow.
A cylindrical object gives a shadow of a line.
A cuboidal object gives a rectangular shape shadow.
(i) A ball will give the shadow of a circle when tourch is above the ball.
(ii) A cylindrical pipe will give the shadow of a line.
(iii) A book will give image of a rectangle.