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Calculate. The speed of light
EduBook Organización
- 3410 visitas
Calculate the distance in km that light travels in 20 s. d = km Calculate the distance in km that light travels in methacrylate in 20 s d = km If sunlight takes 8 minutes to reach Earth through the…
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Reflection and refraction of light
EduBook Organización
- 3133 visitas
4.1. Bending of light rays The effects of reflection and refraction of light happen because of the linear propagation of light. 4.2. Reflection of light Reflection happens when light rays meet a smooth…
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True/False Light and Sound
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Answer true or false: Sunlight comes instantly to Earth. All objects emit their own light. The speed of light is faster than the speed of sound. Sound can be spread by a vacuum.
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Calculate. The speed of light
EduBook Organización
- 2843 visitas
The Sun's light takes approximately 8 seconds to reach the Earth. How far is the Sun from the Earth? d = km If the average distance from Pluto to the Sun is 5.9 billion kilometres, how long does it…
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Check. The nature of light
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Remember what you have studied in this section and answer the questions: What is light made up of? ➞ Light is made up of... In which substance does light travel at its maximum speed?
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Reflection and refraction of light
EduBook Organización
- 2729 visitas
Objects reflect light When light shines on an object, sometimes it passes through the object and other times it reflects off it. When an object reflects light, we can see it. Mirrors A mirror is a…
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Check. Light, shadow and penumbra
EduBook Organización
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Remember what you have studied in this section and answer the questions: Name two effects that show that light travels in a straight line. Can you demonstrate it now? With a classmate, describe the…
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Summaries - Waves. Light and sound
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1. Waves An oscillatory or vibratory motion takes place around a central position. It produces the same amount of movement on both sides of this position. A wave is the transmission of an oscillatory or…
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Answer. Light, shadow and penumbra
EduBook Organización
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Remember what you have studied in this section and answer the questions: What is a light ray? Light gives off energy. Give an example of something that shows this.
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True / False. Properties of light
EduBook Organización
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Are these sentences true or false? Light sources produce light. There are natural light sources and artificial light sources. We can convert light from the Sun into electrical energy using solar panels.…
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