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Questions and Answers
What is the angle between the two lateral faces of a triangular glass prism called?
What is the angle between the two lateral faces of a triangular glass prism called?
In a triangular glass prism, how does the emergent ray bend in relation to the incident ray?
In a triangular glass prism, how does the emergent ray bend in relation to the incident ray?
What happens to the light ray as it enters from air to glass at the first surface of a triangular glass prism?
What happens to the light ray as it enters from air to glass at the first surface of a triangular glass prism?
How does light bend as it enters from glass to air at the second surface of a triangular glass prism?
How does light bend as it enters from glass to air at the second surface of a triangular glass prism?
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What is the angle called that represents the deviation of the emergent ray in a triangular glass prism?
What is the angle called that represents the deviation of the emergent ray in a triangular glass prism?
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How is the refraction of light through a triangular glass prism different from that through a rectangular glass slab?
How is the refraction of light through a triangular glass prism different from that through a rectangular glass slab?
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What is the sequence of colours that you see on the screen when white light is passed through a prism?
What is the sequence of colours that you see on the screen when white light is passed through a prism?
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What is the phenomenon called when white light is split into its component colours by a prism?
What is the phenomenon called when white light is split into its component colours by a prism?
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Who was the first to use a glass prism to obtain the spectrum of sunlight?
Who was the first to use a glass prism to obtain the spectrum of sunlight?
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What causes a rainbow to appear in the sky after a rain shower?
What causes a rainbow to appear in the sky after a rain shower?
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What happens when different colours of light pass through a prism?
What happens when different colours of light pass through a prism?
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What does a rainbow always form in a direction opposite to?
What does a rainbow always form in a direction opposite to?
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What did Isaac Newton do to try to split the colours of the spectrum of white light further?
What did Isaac Newton do to try to split the colours of the spectrum of white light further?
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What is the band of the coloured components of a light beam called?
What is the band of the coloured components of a light beam called?
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What did Isaac Newton observe when he placed a second identical prism in an inverted position with respect to the first prism?
What did Isaac Newton observe when he placed a second identical prism in an inverted position with respect to the first prism?
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What is a natural spectrum appearing in the sky after a rain shower caused by?
What is a natural spectrum appearing in the sky after a rain shower caused by?
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Study Notes
Glass Prism and Light Behavior
- The angle between the two lateral faces of a triangular glass prism is known as the apex angle.
- The emergent ray bends away from the normal relative to the incident ray when passing through the prism.
- As light enters the glass from the air at the first surface, it slows down and bends towards the normal.
- When light exits the glass to the air at the second surface, it speeds up and bends away from the normal.
- The angle that represents the deviation of the emergent ray is called the angle of deviation.
- Refraction through a triangular glass prism differs from that through a rectangular glass slab because the prism causes light to diverge into its component colors, while the slab does not.
Color Spectrum and Refraction
- The sequence of colors observed when white light passes through a prism is red, orange, yellow, green, blue, indigo, and violet.
- The phenomenon of white light being separated into its component colors is known as dispersion.
- Isaac Newton was the first to use a glass prism to obtain the spectrum of sunlight.
Rainbows and Light Behavior
- A rainbow appears in the sky after a rain shower due to the refraction, dispersion, and reflection of sunlight in water droplets.
- Different colors of light passing through a prism bend at different angles, resulting in a spectrum.
- A rainbow always forms in a direction opposite to the sun.
- Newton attempted to split the colors of the spectrum of white light further by using another prism to analyze the colors produced.
Additional Observations
- The band of the colored components resulting from the mixing of light is called the spectrum.
- When a second identical prism is placed in an inverted position relative to the first, Newton observed that the initial colors could be recombined into white light.
- The natural spectrum appearing in the sky after a rain shower is caused by the same principles of refraction, reflection, and dispersion in water droplets.
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Description
Explore how light refracts through a transparent prism with triangular bases and rectangular lateral surfaces. Understand the angles and displacement of the emergent ray in this optical phenomenon.
