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# Refraction Definition and Laws Quiz

Created by
@PrudentRainforest

### What is the term used to describe the bending of a ray of light when it goes from one medium to another?

• Dispersion
• Diffraction
• Refraction (correct)
• Reflection
• ### Which law of refraction states that the incidence ray, normal, and refracted ray are all in the same plane?

• Fermat's Principle
• Snell's Law
• Law of Reflection (correct)
• Huygens' Principle
• ### What is the critical angle?

• The angle at which light passes without bending
• The angle at which total internal reflection occurs (correct)
• The angle of refraction whose corresponding angle of incidence is 90 degrees
• The angle of incidence whose corresponding angle of refraction is 45 degrees
• ### Which type of lens produces virtual images?

<p>Concave lens</p> Signup and view all the answers

### What is the formula used to calculate focal length, object distance, and image distance for lenses?

<p>$f = \frac{1}{v} - \frac{1}{u}$</p> Signup and view all the answers

### What does the power of a lens represent?

<p>$\frac{1}{f}$ where $f$ is the focal length of the lens</p> Signup and view all the answers

### In what situation is light going from a denser to a rarer medium refracted?

<p>Toward the normal</p> Signup and view all the answers

### What characterizes the human eye's lens alongside the cornea?

<p>$\frac{1}{f}$ is positive for it</p> Signup and view all the answers

### What does the refractive index (n) of a medium signify?

<p>The speed of light in the medium</p> Signup and view all the answers

### When light travels from a rarer to a denser medium, how is it refracted?

<p>Away from the normal</p> Signup and view all the answers

### What is the main characteristic of a concave lens?

<p>Produces virtual images</p> Signup and view all the answers

### What happens to the power of a lens when two lenses with equal power are in contact?

<p>It remains the same</p> Signup and view all the answers

### Which law is also known as Snell's Law?

<p>Law of Refraction</p> Signup and view all the answers

### How is the critical angle defined in optics?

<p>The angle at which light is totally internally reflected</p> Signup and view all the answers

### What type of system does the human eye lens form with the cornea?

<p>Converging system</p> Signup and view all the answers

### What does the formula 1/f = 1/u + 1/v represent for lenses?

<p>Relationship between focal length, object distance, and image distance</p> Signup and view all the answers

## Study Notes

### Refraction

• Refraction is the bending of a ray of light when it goes from one medium to another.
• Three main components of refraction are incident ray, normal, and refracted ray, which are all in the same plane.
• The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant for two given media, known as Snell's Law.
• Light is refracted towards the normal when going from denser to rarer medium, and away from the normal when going from rarer to denser medium.
• The critical angle is the angle of incidence whose corresponding angle of refraction is 90 degrees.

### Optical Fibre

• An optical fibre is a thin transparent rod (usually of glass) through which light can travel by total internal reflection.
• The refractive index (n) of a medium is equal to the ratio of real depth to apparent depth, or the ratio of velocity in medium 1 to velocity in medium 2.

### Lenses

• There are two types of lenses: concave (diverging) and convex (converging).
• Concave lenses produce virtual images, while convex lenses produce both real and virtual images.
• The formula 1/f = 1/u + 1/v is used to calculate focal length (f), object distance (u), and image distance (v).
• The power of a lens is equal to 1/f, and the power of a combination of lenses is equal to P1 + P2, where P1 and P2 are the powers of the individual lenses.
• The human eye uses a lens which, alongside the cornea, produces a converging system.

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## Description

Test your knowledge on the definition and laws of refraction in physics. Learn about Snell's Law and how light behaves when it goes from one medium to another.

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