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ChatGPT
Jul 30
Snell's law, also known as the law of refraction, describes how light waves change direction when they pass from one medium to another. It states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities of light in the two media. This law is named after the Dutch mathematician Willebrord Snellius, who first described it in the 17th century.
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Google Gemini AI
Jul 30
Snell's Law
Snell's law describes the relationship between the angles of incidence and refraction of a light ray passing from one medium to another. It states that:
The ratio of the sine of the angle of incidence (θ₁) to the sine of the angle of refraction (θ₂) is constant for a particular pair of media.
Mathematically, it is expressed as:
```
sin θ₁ / sin θ₂ = v₁ / v₂ = n₂ / n₁
```
where:
- θ₁ is the angle of incidence (the angle between the incident ray and the normal to the surface)
- θ₂ is the angle of refraction (the angle between the refracted ray and the normal)
- v₁ is the speed of light in the first medium
- v₂ is the speed of light in the second medium
- n₁ is the refractive index of the first medium (a measure of how much light bends when passing through the medium)
- n₂ is the refractive index of the second medium
Implications of Snell's Law:
- When a ray of light passes from a medium of lower refractive index to a medium of higher refractive index, it bends towards the normal.
- When a ray of light passes from a medium of higher refractive index to a medium of lower refractive index, it bends away from the normal.
- The critical angle is the angle of incidence for which the refracted ray is parallel to the interface between the two media.
- Snell's law is used in various applications, such as:
- Designing lenses and optical instruments
- Understanding image formation in cameras and telescopes
- Calculating the speed of light in different media
Snell's law describes the relationship between the angles of incidence and refraction of a light ray passing from one medium to another. It states that:
The ratio of the sine of the angle of incidence (θ₁) to the sine of the angle of refraction (θ₂) is constant for a particular pair of media.
Mathematically, it is expressed as:
```
sin θ₁ / sin θ₂ = v₁ / v₂ = n₂ / n₁
```
where:
- θ₁ is the angle of incidence (the angle between the incident ray and the normal to the surface)
- θ₂ is the angle of refraction (the angle between the refracted ray and the normal)
- v₁ is the speed of light in the first medium
- v₂ is the speed of light in the second medium
- n₁ is the refractive index of the first medium (a measure of how much light bends when passing through the medium)
- n₂ is the refractive index of the second medium
Implications of Snell's Law:
- When a ray of light passes from a medium of lower refractive index to a medium of higher refractive index, it bends towards the normal.
- When a ray of light passes from a medium of higher refractive index to a medium of lower refractive index, it bends away from the normal.
- The critical angle is the angle of incidence for which the refracted ray is parallel to the interface between the two media.
- Snell's law is used in various applications, such as:
- Designing lenses and optical instruments
- Understanding image formation in cameras and telescopes
- Calculating the speed of light in different media
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Beka kenea
Jul 30
Which of the following statement is correct about the resistance of a conducting wire? The resistance of the wire is
A .directly proportional to the square of it's cross sectional area
B.directly proportional to the square of it's length
C.inversly proportional to its length
D.inversily proportional to its cross sectional area
A .directly proportional to the square of it's cross sectional area
B.directly proportional to the square of it's length
C.inversly proportional to its length
D.inversily proportional to its cross sectional area
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