CBSE Science Class 6 -Chapter 11-Light, Shadows and Reflections- NCERT Exercise Solution (Question-Answer) is provided below. Total 04 Questions are in this NCERT Chapter Exercise, all are solved here.
Q1. Rearrange the boxes given below to make a sentence that helps us understand opaque objects.
| OWS | AKE | OPAQ | UEO | BJEC | TSM | SHAD |
Answer: Opaque objects make shadows.
| OPAQ | UEO | BJEC | TSM | AKE | SHAD | OWS |
Q2. Classify the objects or materials given below as opaque, transparent or translucent and luminous or non-luminous:
Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, a sheet of cellophane, a wire mesh, kerosene stove, sun, firefly, moon.
Answer:
| Materials | Opaque | Transparent | Translucent | Luminous | Non-luminous |
| Air | — | ✔ | — | — | ✔ |
| Water | — | ✔ | — | — | ✔ |
| A piece of rock | ✔ | — | — | — | ✔ |
| A sheet of aluminium | ✔ | — | — | — | ✔ |
| A mirror | ✔ | — | — | — | ✔ |
| A wooden board | ✔ | — | — | — | ✔ |
| A sheet of polythene, | — | — | ✔ | — | ✔ |
| A CD | ✔ | — | — | — | ✔ |
| Smoke | — | — | ✔ | — | ✔ |
| A sheet of plane glass | — | ✔ | — | — | ✔ |
| Fog | — | — | ✔ | — | ✔ |
| A piece of red hot iron | ✔ | — | — | ✔ | — |
| An umbrella | ✔ | — | — | — | ✔ |
| A lighted fluorescent tube | ✔ | — | — | ✔ | — |
| A wall | ✔ | — | — | — | ✔ |
| A sheet of carbon paper | ✔ | — | — | — | ✔ |
| The flame of a gas burner | — | — | ✔ | ✔ | — |
| A sheet of cardboard | ✔ | — | — | — | ✔ |
| A lighted torch | ✔ | — | — | ✔ | — |
| A sheet of cellophane | — | ✔ | — | — | ✔ |
| A wire mesh | — | — | — | — | ✔ |
| Kerosene stove | ✔ | — | — | ✔ | — |
| Sun | ✔ | — | — | ✔ | — |
| Firefly | ✔ | — | — | ✔ | — |
| Moon | ✔ | — | — | — | ✔ |
Q3. Can you think of creating a shape that would give a circular shadow if held in one way and a rectangular shadow if held in another way?
Answer: Yes, I think of creating a shape that will give a circular shadow if held in one way and a rectangular shadow if held in another way.
Q4. In a completely dark room, if you hold up a mirror in front of you, will you see a reflection of yourself in the mirror?
Answer: No, we will not be able to see ourselves in the mirror in the darkroom because there are no light rays that will come in our eyes after reflecting on the various objects.
👉 In this case “I” am the object. First, light rays have to strike on my body. Then, light rays go to the mirror and get reflected back in my eyes. By this way, I will be able to see myself in the mirror.
But, in the case of the darkroom, I will not be able to see myself in the mirror. 🤷♀️