i) Is the object visible to you? ii) Why is it not visible though there is light?

Question

Make your room dark by shutting the door and windows; and then put on the light. Look at any one of the objects in the room. After that, hold a plank or a writing pad in front of your face. 

i) Is the object visible to you?

ii) Why is it not visible though there is light?

iii) What happens when you hold a plank between the object and you?

iv) What is that something coming from the object?

v) Where does light come from?

vi) Which objects give us light?

vii) Can you give some more examples for source of light?

viii) When did you see shadow? Is it during day time or at night?

ix) Are shadows formed at night?

x) Is it possible to form shadows when there is no sunlight, bulb or any other light?

xi) What do we need to form a shadow?

Answer 1

i) No the object can’t visible to me.

ii) Light can’t reach the eyes. So it is not visible.

iii) Plank prevent the light. So it can’t reach the eyes.

iv) Its light that causes sight sense.

v) A substance which gives light is known as a light source.

vi) Objects give us light are Sun, a glowing bulb, lighted candle etc.

vii) Sun, stars, torch, candle, bulb, flame, glowing worm.

viii) I saw the shadow at day time.

ix) No, generally shadows does not form at night time. We may form shadows by using light at night time.

x) Its not possible to form shadows without light.

xi) We need light to get the shadow of any object.