Light Properties

Investigating Properties of Light

Steve John Mart Jose

Teacher III​

Have you experienced a brownout at home at night? What difficulties related to this did you have? Without light, you cannot see; thus, you will not be able to do what you need to do or go to where you want to go. Light comes from different sources called light sources; our main natural light source is the sun. Others include fire, stars, and manmade sources such as light-bulbs and torches. Catch a glimpse how amazing light can be.

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LET'S GET STARTED!

Multiple Choice

Which of the following terms allow some of the light to pass through?

• opaque

• transparent material

• refraction

• translucent material

Multiple Choice

Which of the following is considered to be the best reflector of light?

• glass

• river

• mirror

• wax paper

Multiple Choice

Why is a spoon placed in a glass of water looks broken?

• because of reflection

• because of refraction

• because of too much light

• because of wavelength

Multiple Choice

Which of the following happens when light is absorbed by the surface of a material?

• absorption

• reflection

• refraction

• shadowing

Multiple Choice

5. Which of the following terms does not allow light to pass through?

• opaque

• transparent material

• refraction

• translucent material

Lesson 1: Investigating Properties of Light

Light makes you see the things around you. Without light, you cannot see objects at night or the beauty of the world in the morning. Everything will be dark. Can you imagine how boring life would be without light? Light is a form of energy. It travels very fast. In space, it travels about 300, 000, 000 meters per second. It is bright during the day because the light from the sun reaches us.​

Lesson 1: Investigating Properties of Light

Light travels in a straight line. It cannot bend around a corner. The inability of light to bend around a corner is the reason why we have night and day. It is daytime on the side of the Earth that is facing the sun because it is directly hit by the light from the sun. the other side is at nighttime because it receives no light from the sun. Aside from traveling in a straight line, light also travels in all directions. For instance, when you turn on the light in a dark room, the whole room is lit up.

Lesson 1: Investigating Properties of Light

Lesson 1: Investigating Properties of Light

Lesson 1: Investigating Properties of Light

Lesson 1: Investigating Properties of Light

Lesson 1: Investigating Properties of Light

​Perform the activity and answer the questions that follow.

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1. You will need the following materials: transparent glass, pencil and water

2. Perform the activity.

3. Half-fill the glass with water.

4. Place the pencil in the glass of water. View the pencil, first on top, by placing your face above the mouth of the glass, and then view the pencil at the side. Record your observation for each position in your answer sheet or activity notebook.

5. Take out the pencil from the water. Look at it. Feel it. Is it straight or bent?

Lesson 1: Investigating Properties of Light

Guide Questions:

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1. Describe the appearance of the pencil when you viewed it from the top.

2. Describe the appearance of the pencil when you viewed it from the side.

3. Did the appearance of the pencil change when you took it out of the glass?

4. What do your observations show about the way light travels through different media?

Lesson 1: Investigating Properties of Light

​Light travels in straight lines and in all directions, but it cannot pass through all materials.

Light can pass through transparent materials.

Only some light can pass through translucent materials.

Light cannot pass through opaque materials.

Refraction is the bending of light rays as they pass through different transparent materials.

Reflection is the bouncing of light when it hits an object, some objects with flat surfaces and some objects with uneven surfaces. An objects color depends on the colors it absorbs and reflects.

Lesson 1: Investigating Properties of Light

DID YOU UNDERSTAND THE LESSON FOR TODAY?

Multiple Choice

Which of the following materials allow almost all light to pass through?

• tinted glass

• wax paper

• reading glass

• frosted glass

Multiple Choice

Which of the following is being created by opaque materials?

• reflection

• refraction

• different colors

• shadow

Multiple Choice

Which of the following materials allow some of the light only to pass through them?

• mirror

• color tracing paper

• wooden box

• concrete walls

Multiple Choice

What is the primary source of light?

• fire

• sun

• torches

• stars

Multiple Choice

What do we call the light we see with our eyes?

• visible light

• sunlight

• moonlight

• infrared light

Multiple Choice

Which term describes light bouncing off an object?

• refraction

• translucent

• reflection

• transformation

Multiple Choice

Which of the following material can be used to protect ourselves from excessive heat and light?

• perfume

• hat

• bracelet

• head band

Multiple Choice

What is a white light?

• Anything that makes light.

• A shiny surface that reflects light

• All light colors mixed together.

• Created when objects block light.

Multiple Choice

Which type of object blocks all light from passing through?

• clear

• translucent

• opaque

• transparent

Multiple Choice

What happens when light hits an uneven surface of an object?

• It creates a shadow.

• It is absorbed by the surface.

• It reflects light in one direction.

• It reflects light in many different directions.