Asked by josh
ture or false
1. When light waves strike a mirror, they change direction.
2. Light waves travel at the same speed in all materials.
ANSWER THE FOLLOWING QUESTIONS (READ PAGES 456-461)
1.Visual Check (458) Do tires usually absorb, transmit, or reflect light waves? Explain your answer.
2. Reading Check (458) Give one reason why the energy carried by sound waves decreases as those sound waves travel through air.
3. Key Concept Check (458) What are three ways that waves interact with matter?
4. Reading Check (459) What is the Law of Reflection?
5. Key Concept Check (461) Compare and contrast reflection, refraction, and diffraction.
All Answers 1
Answered by
GPT-5 mini
AI
True or False
1. True — When light waves hit a mirror they are reflected, so their direction changes.
2. False — Light travels at different speeds in different materials; its speed depends on the medium’s refractive index.
Questions
1. Visual Check (458) — Do tires usually absorb, transmit, or reflect light waves? Explain.
- Tires mainly absorb light. Rubber is opaque and dark, so most incident light is absorbed (converted to heat); only a small amount is reflected (mostly diffuse reflection).
2. Reading Check (458) — Give one reason why the energy carried by sound waves decreases as those sound waves travel through air.
- Air absorbs sound: interactions between air molecules (viscosity, thermal conduction) convert some sound energy into heat, so the wave’s energy (and intensity) decreases with distance.
3. Key Concept Check (458) — What are three ways that waves interact with matter?
- Reflection, transmission (often including refraction when entering a new medium), and absorption.
4. Reading Check (459) — What is the Law of Reflection?
- The angle of incidence equals the angle of reflection; the incident ray, reflected ray, and the normal to the surface all lie in the same plane.
5. Key Concept Check (461) — Compare and contrast reflection, refraction, and diffraction.
- Reflection: waves bounce off a surface back into the original medium (angle of incidence = angle of reflection). Example: mirror.
- Refraction: waves change speed and direction when they pass from one medium into another (bending described by Snell’s law). Example: a straw appearing bent in water.
- Diffraction: waves bend and spread around obstacles or through openings; pronounced when obstacle/opening size is comparable to the wavelength. Example: sound heard around a corner or light spreading through a narrow slit.
- Contrast: reflection keeps the wave in the same medium; refraction involves transmission into a new medium with a speed change; diffraction occurs without changing medium and is about spreading around edges.
1. True — When light waves hit a mirror they are reflected, so their direction changes.
2. False — Light travels at different speeds in different materials; its speed depends on the medium’s refractive index.
Questions
1. Visual Check (458) — Do tires usually absorb, transmit, or reflect light waves? Explain.
- Tires mainly absorb light. Rubber is opaque and dark, so most incident light is absorbed (converted to heat); only a small amount is reflected (mostly diffuse reflection).
2. Reading Check (458) — Give one reason why the energy carried by sound waves decreases as those sound waves travel through air.
- Air absorbs sound: interactions between air molecules (viscosity, thermal conduction) convert some sound energy into heat, so the wave’s energy (and intensity) decreases with distance.
3. Key Concept Check (458) — What are three ways that waves interact with matter?
- Reflection, transmission (often including refraction when entering a new medium), and absorption.
4. Reading Check (459) — What is the Law of Reflection?
- The angle of incidence equals the angle of reflection; the incident ray, reflected ray, and the normal to the surface all lie in the same plane.
5. Key Concept Check (461) — Compare and contrast reflection, refraction, and diffraction.
- Reflection: waves bounce off a surface back into the original medium (angle of incidence = angle of reflection). Example: mirror.
- Refraction: waves change speed and direction when they pass from one medium into another (bending described by Snell’s law). Example: a straw appearing bent in water.
- Diffraction: waves bend and spread around obstacles or through openings; pronounced when obstacle/opening size is comparable to the wavelength. Example: sound heard around a corner or light spreading through a narrow slit.
- Contrast: reflection keeps the wave in the same medium; refraction involves transmission into a new medium with a speed change; diffraction occurs without changing medium and is about spreading around edges.
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