Fill in the blanks :

(a) Light gives us the sensation of …………… .

(b) The sun is a …………… source of light.

(c) A medium through which light cannot pass is called the …………… .

(d) A medium which allows light to pass through it easily is called the …………… .

(e) Moon is a …………… body.

(f) Light travels in a …………… path.

(g) In a pin hole camera, the image formed is …………… .

(h) The darkest portion of a shadow is called the …………… .

(i) The less dark portion of a shadow is called the …………… .

(j) Lunar eclipse occurs when the …………… comes in between the …………… and the sun.

Write true or false for each statement :

(a) The moon is a natural source of light.

(b) The moon is self luminous.

(c) We can see an object through an opaque medium.

(d) Light passes through glass.

(e) Light travels in a straight line path.

(f) Image formed in a pin hole camera is real.

(g) The image in a pin hole camera gets blurred if the hole is made bigger.

(h) A shadow is formed because light travels in a straight line path.

(i) Solar eclipse occurs when the sun comes in between the earth and the moon.

(j) If the shadow of earth falls on the moon, the eclipse is called lunar eclipse.

What is light ? Define it.

How does light make an object visible ?