Optics Test Review

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Questions and Answers

What happens to a ray of light when it travels from a slow to a fast medium past the critical angle?

It reflects back into the slow medium. (correct)

It is absorbed by the medium.

It bends away from the normal.

It continues in a straight line.

The angle of incidence is always equal to the angle of reflection.

True

What are the primary light colors?

Red, Blue, Green

The complementary color to the primary light color red is __________.

cyan Signup and view all the answers

Match the primary light colors with their corresponding secondary colors:

Red = Cyan Green = Magenta Blue = Yellow Yellow = Blue Signup and view all the answers

What type of mirror always produces a virtual image that is smaller than the object?

Convex mirror Signup and view all the answers

Incandescence is a type of light emission from chemical reactions.

False Signup and view all the answers

What is the distance from a mirror to its focal point called?

focal length Signup and view all the answers

Light emitted from living organisms is known as __________.

bioluminescence Signup and view all the answers

Match the terms with their definitions:

Translucent = A material that allows some light to pass through. Specular reflection = Reflection off a smooth surface. Opaque = A material that does not allow light to pass through. Diffuse reflection = Reflection off a rough surface. Signup and view all the answers

Which one of the following is an example of a primary additive color?

Red Signup and view all the answers

A non-luminous object produces its own light.

False Signup and view all the answers

The angle between the incident ray and the normal is called the __________.

angle of incidence Signup and view all the answers

What is the correct order of the parts of the electromagnetic spectrum starting with the least energetic?

Radio, Microwave, Infrared, Visible Light, UV Light, X-ray, Gamma Rays Signup and view all the answers

Ultraviolet light is primarily used for medical imaging.

False Signup and view all the answers

List the seven colors identified in the visible spectrum of white light.

Red, Orange, Yellow, Green, Blue, Indigo, Violet Signup and view all the answers

When light passes from a faster medium to a slower medium, it bends ___.

towards the normal Signup and view all the answers

Match each electromagnetic wave with its primary usage:

X-rays = Medical imaging Ultraviolet light = Vitamin D Radio waves = Telecommunication Microwaves = Radar Gamma rays = Cancer treatment Visible light = Theatre concert effects Signup and view all the answers

What are the four characteristics of an image formed by a convex mirror?

Size, Attitude, Location, Type Signup and view all the answers

What happens to an image in a concave mirror when the object is placed beyond the focal point?

The image is inverted. Signup and view all the answers

Convex mirrors provide a small field of view, making them ideal for sharp turns in parking garages.

False Signup and view all the answers

Study Notes

Optics Test Review

Reflection:
- The angle of incidence equals the angle of reflection
- The incident ray, reflected ray, and normal are on the same plane
Electromagnetic Spectrum (least to most energetic):
- Radio waves
- Microwaves
- Infrared
- Visible light
- Ultraviolet
- X-rays
- Gamma rays
Electromagnetic Waves and Their Uses:
- X-rays: Medical imaging
- Ultraviolet light: Vitamin D
- Radio waves: Telecommunication, TV remote control
- Infrared light: Radar, theatre/concert effects
- Microwaves: TV remote control, radar
- Gamma rays: Cancer treatment
- Visible light: Medical imaging, theatre/concert effects
Primary and Secondary Colors:
- Primary colors: Red, green, blue
- Secondary colors: Cyan, yellow, magenta
- Combining primary colors produces white light
- Combining secondary colors produces white light
Visible Spectrum Colors:
- Red, orange, yellow, green, blue, indigo, violet
Reflection Types:
- Specular reflection: Smooth surfaces, clear reflections (e.g., mirror)
- Diffuse reflection: Irregular surfaces, scattered reflections (e.g., a wall)
Luminous and Non-luminous Objects:
- Luminous objects produce their own light (e.g., sun, lightbulb)
- Non-luminous objects reflect light (e.g., moon, table)
Types of Mirrors:
- Plane mirror: Flat surface, creates upright, virtual images
- Convex mirror: Bulging outward, creates smaller, virtual images, wide field of view
- Concave mirror: Curves inward, image depends on object position (upright or inverted)

Laws of Reflection and Refraction

Refraction:
- Light bends when traveling from one medium to another
- When light moves to a slower medium it bends toward the normal.
Total Internal Reflection:
- Occurs when light traveling from a slower to faster medium, bends past the critical angle, and is reflected back into the slower medium.
Concave Mirrors:
- If the object is between the focal point and mirror, the image is upright and magnified, located behind the mirror (virtual).
- If the object is beyond the focal point, the image is inverted, real, and smaller, located in front of the mirror.
Convex Mirrors:
- The image is always upright and smaller, and virtual. The location is behind the mirror.
Color Mixing Summary:
- Red, green and blue light create white light (or when superimposed).
- Red light can not create a green color appears black.

Additional Questions

Complementary Colors:
- Red's complementary color is cyan
Color Filters:
- A green filter followed by a yellow filter, would result in a yellow color (filtering white light)
Ray Diagrams: Students are required to draw and label ray diagrams depicting how light reflects off mirrors and lenses. Analyze these diagrams to determine image characteristics.

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Description

This quiz covers key concepts in optics, including reflection, the electromagnetic spectrum, and the properties of light such as primary and secondary colors. Review the uses of various electromagnetic waves and understand how colors combine to produce white light. Perfect for understanding fundamental optics principles.