{"id":2162,"date":"2020-12-06T14:26:35","date_gmt":"2020-12-06T14:26:35","guid":{"rendered":"https:\/\/themindpalace.in\/?p=2162"},"modified":"2021-08-26T05:34:02","modified_gmt":"2021-08-26T05:34:02","slug":"light-shadows-and-reflections","status":"publish","type":"post","link":"https:\/\/themindpalace.in\/index.php\/2020\/12\/06\/light-shadows-and-reflections\/","title":{"rendered":"Light, Shadows and Reflections"},"content":{"rendered":"\n

Summary of light shadows and reflection<\/a><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Summary<\/h1>\n\n\n\n

Light:<\/span><\/strong>Light, electromagnetic radiation that can be detected by the human eye.<\/p>\n\n\n\n

Shadows<\/span><\/strong>:A shadow is a dark (real image) area where light from a light source is blocked by an opaque object.<\/p>\n\n\n\n

Reflection:<\/strong><\/span>The production of an image by or as if by a mirror<\/p>\n\n\n\n

Luminous<\/span><\/strong><\/p>\n\n\n\n

Objects like the sun that give out or emit light of their own are called luminous objects.<\/p>\n\n\n\n

TRANSPARENT, OPAQUE AND  TRANSLUCENT OBJECTS OBJECTS<\/span><\/strong><\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

TRANSPARENT::<\/span><\/strong> If you are able to see clearly through an object, it is allowing light to pass through it and is transparent. ex air, water, and clear glass <\/p>\n\n\n\n

Opaque object<\/strong>:<\/span><\/p>\n\n\n\n

If we cannot see through an object at all, it is an opaque object<\/strong><\/p>\n\n\n\n

Ex:<\/strong> wood, stone<\/p>\n\n\n\n

Translucent:<\/span><\/strong>There are some objects through which we can see, but not very clearly. Such objects are known As translucent. Ex rosted glass and some plastics<\/p>\n\n\n\n

WHAT EXACTLY ARE SHADOWS<\/span><\/strong><\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

A  shadow is a dark real image area where light  from a light source is blocked by an opaque object.<\/p>\n\n\n\n

A PINHOLE CAMERA<\/span><\/strong><\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

A pinhole camera<\/strong><\/em> is a simple camera without a lens but with a tiny aperture effectively a light-proof box with a small hole in one side. Holding the pinhole camera look through the open face of the smaller box. You should use a piece of black cloth to cover your head and the pinhole camera.<\/p>\n\n\n\n

Use of Pin hole camera pinhole<\/strong>  camera is used to is to capture the photography AND  movement of the sun over a long period of time. This type of photography is called solography. Pinhole<\/strong> photography is used for artistic reasons, but also for educational purposes to let pupils learn about, and experiment with, the basics of photography.<\/p>\n\n\n\n

MIRRORS AND REFLECTIONS<\/span><\/strong><\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

We all use mirrors at home. You look into the mirror and see your own face inside the mirror. What you see is a reflection of your face in the mirror. Sometimes, we see reflections of trees, buildings and other objects in the water of a pond or a lake.<\/p>\n\n\n\n

Exercise<\/p>\n\n\n\n

1.Rearrange the boxes given below to make a sentence that helps us to understand opaque objects.<\/span><\/p>\n\n\n\n

OWS<\/td>AKE<\/td>OPAQ<\/td>UEO<\/td>BJEC<\/td>TSM<\/td>SHAD<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Solution<\/span><\/strong><\/p>\n\n\n\n

OPAQ<\/td>UEO<\/td>BJEC<\/td>TSM<\/td>AKE<\/td>SHAD<\/td>OWS<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

2. Classify the objects or materials given below as opaque, transparent or translucent and luminous or non-luminous:<\/span><\/strong><\/p>\n\n\n\n

Air, water, a piece of rock, a sheet of aluminum, 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, the moon.<\/strong><\/p>\n\n\n\n

Solution<\/span><\/strong><\/p>\n\n\n\n

Opaque<\/strong><\/td>Transparent<\/strong><\/td>Translucent<\/strong><\/td>Luminous<\/strong><\/td>Non-luminous<\/strong><\/td><\/tr>
a piece of rock<\/td>Air<\/td>A sheet of polythene<\/td>A lightened fluorescent tube<\/td>A mirror<\/td><\/tr>
a sheet of aluminum<\/td>Water<\/td>Fog<\/td>the flame of a gas burner<\/td>A piece of rock<\/td><\/tr>
A CD<\/td>A sheet of plane glass<\/td>A sheet of cellophane<\/td>a lighted torch<\/td>A wire mesh<\/td><\/tr>
Smoke<\/td> <\/td> <\/td>Firefly<\/td>Iron<\/td><\/tr>
Iron<\/td> <\/td> <\/td>Stove<\/td>A wall<\/td><\/tr>
An umbrella<\/td> <\/td> <\/td>Sun<\/td> <\/td><\/tr>
A wall<\/td> <\/td> <\/td>Moon<\/td> <\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

3. 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?<\/strong><\/p>\n\n\n\n

Ans:<\/span><\/strong>Yes<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

4. 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?<\/strong><\/p>\n\n\n\n

Ans:<\/span><\/strong>No, in a dark room, a mirror reflection of the image will not be shown as the light will not fall on the mirror to reflect the image.<\/p>\n\n\n\n

Name some Transparent objects or materials.<\/h5>\n\n\n\n

Ans:<\/span><\/strong>Air, Water, A sheet of plane glass, etc.<\/p>\n\n\n\n

Name some non luminous object or material<\/h5>\n\n\n\n

Ans<\/strong><\/span>:A mirror, Iron, A wire mesh, A piece of rock, etc.<\/p>\n\n\n\n

Name some opaque object or material<\/strong><\/p>\n\n\n\n

Ans:<\/span><\/strong>A sheet of aluminium , smoke iron etc<\/p>\n","protected":false},"excerpt":{"rendered":"

Summary of light shadows and reflection Summary Light:Light, electromagnetic radiation that can be detected by the human eye. Shadows:A shadow is a dark (real image) area where light from a light source is blocked by an...<\/p>\n","protected":false},"author":3,"featured_media":2163,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[115,475,28],"tags":[262,97,260,261,263],"cp_meta_data":{"_edit_lock":["1629956042:2"],"_last_editor_used_jetpack":["block-editor"],"_thumbnail_id":["2163"],"_jetpack_related_posts_cache":["a:1:{s:32:\"8f6677c9d6b0f903e98ad32ec61f8deb\";a:2:{s:7:\"expires\";i:1775265501;s:7:\"payload\";a:3:{i:0;a:1:{s:2:\"id\";i:2124;}i:1;a:1:{s:2:\"id\";i:1156;}i:2;a:1:{s:2:\"id\";i:2199;}}}}"],"_edit_last":["2"]},"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/themindpalace.in\/wp-content\/uploads\/2020\/12\/Slide1-5.jpg","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/posts\/2162"}],"collection":[{"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/comments?post=2162"}],"version-history":[{"count":4,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/posts\/2162\/revisions"}],"predecessor-version":[{"id":2496,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/posts\/2162\/revisions\/2496"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/media\/2163"}],"wp:attachment":[{"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/media?parent=2162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/categories?post=2162"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/tags?post=2162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}