The Eye & Optical Tools
This part of the eye converts light images into electrical signals.
Answer: What is the retina?
This type of mirror curves inward and can form real or virtual images.
Answer: What is a concave mirror?
This color of visible light has the longest wavelength.
Answer: What is red?
These electromagnetic waves have the lowest frequency.
Answer: What are radio waves?
This is the unit used to measure frequency.
Answer: What is Hertz?
This optical instrument uses a concave mirror, a plane mirror, and a convex lens.
Answer: What is a reflecting telescope?
Mirrors do this to light, while lenses do this to light.
Answer: What is reflect and refract?
Light that contains many wavelengths traveling in many directions is called this.
Answer: What is incoherent light?
These waves are mainly responsible for the heat we feel from the Sun.
Answer: What are infrared waves?
All electromagnetic waves travel at this speed in a vacuum.
Answer: What is the speed of light?
This optical instrument uses lenses with short focal lengths to magnify tiny objects.
Answer: What is a microscope?
This type of lens is thicker in the middle and causes light rays to come together.
Answer: What is a convex lens?
Light that vibrates in only one direction is called this type of light.
Answer: What is polarized light?
Doctors use these waves to see inside the human body.
Answer: What are X-rays?
As wavelength decreases, these two properties increase.
Answer: What are frequency and energy?
This distance from a mirror or lens to the focal point is called this length.
Answer: What is focal length?
Microscopes use these types of lenses and these types of focal lengths.
Answer: What are convex lenses and short focal lengths?
A laser produces this kind of light beam.
Answer: What is a narrow, intense beam of coherent light?
This part of the electromagnetic spectrum is used for cell phone communication.
Answer: What are microwaves?
When light passes from air into water and bends, this process occurs.
Answer: What is refraction?
Transparent, translucent, and opaque materials differ in this property of light.
Answer: What is how much light passes through?
This imaginary straight line passes through the center of a mirror or lens and is used in ray diagrams.
Answer: What is the principal axis?
This property describes how much light slows down when entering a material.
Answer: What is index of refraction?
This term describes the entire range of electromagnetic wave frequencies.
Answer: What is the electromagnetic spectrum?
Explain the relationship between wavelength, frequency, and energy.
Answer: What is shorter wavelength means higher frequency and higher energy?