Review Light-1

Eyeglasses and camera lenses change the path of light to focus an image. Which of the following is responsible for that change?

  1. Refraction

    Yes! Refraction bends light as it moves from one substance to another. By bending the light, we can use refraction to focus the image in a camera, or to correct the focus of the lens in our eyes.
  2. Reflection

    No. While some light is reflected from a lens, that does not help us focus the image.
  3. Absorption

    No. The lens is clear, telling us that very little of the light is being absorbed. Absorption does not help the lens focus.
  4. Diffusion

    No. Diffusion is the scattering of light as it is reflected in many different directions. Diffusion would make the image cloudy and blurry, not help focus it.



Click to see which state standards this question tests, and which of my videos, experiments, and other resources support that topic.

Florida


SC.3.P.10.3 Demonstrate that light travels in a straight line until it strikes an object or travels from one medium to another.

SC.3.P.10.4 Demonstrate that light can be reflected, refracted, and absorbed.

SC.7.P.10.2 Observe and explain that light can be reflected, refracted, and/or absorbed.

Utah


UT.8.IV.1.b Compare the transfer of energy (i.e., sound, light, earthquake waves, heat) through various mediums.

NGSS


1-PS4-3 Plan and conduct an investigation to determine the effect of placing objects made with different materials in the path of a beam of light.

MS-PS4-2 Develop and use a model to describe that waves are reflected, absorbed, or transmitted through various materials.