Reflection and Refraction Dr. G

Which of the following best describes the image for a thin converging lens that forms whenever the object is at a distance less than one focal length from the lens?

• inverted, enlarged and real

• upright, enlarged and virtual

• upright, reduced and virtual

• inverted, reduced and real

Which of the following best describes the image for a thin diverging lens that forms whenever the magnitude of the object distance is less than that of the lens' focal length?

• inverted, enlarged and real

• upright, enlarged and virtual

• upright, reduced and virtual

• inverted, reduced and real

The best definition of refraction is ____.

• passing through a boundary

• bouncing off a boundary

• changing speed at a boundary

• changing direction when crossing a boundary

Tags

NGSS.MS-PS4-2

A ray of light in air is incident on an air-to-glass boundary at an angle of 30. degrees with the normal. If the index of refraction of the glass is 1.65, what is the angle of the refracted ray within the glass with respect to the normal?

Use Snell's law:ni * sine(Theta i) = nr * sine(Theta r)

• 56 degrees

• 46 degrees

• 30. degrees

• 18 degrees

Tags

NGSS.HS-PS4-5

If the critical angle for internal reflection inside a certain transparent material is found to be 48.0 degrees, what is the index of refraction of the material? (Air is outside the material).

Use Snell's Law ni * sine(Theta i) = nr * sine(Theta r)

• 1.35

• 1.48

• 1.49

• 0.743

A light ray in air enters and passes through a block of glass. What can be stated with regard to its speed after it emerges from the block?

• speed is less than when in glass

• speed is less than before it entered glass

• speed is same as that in glass

• speed is same as that before it entered glass

Tags

NGSS.HS-PS4-1

Which of the following statements are true of converging lenses?

• Converging lenses are thicker at the center than they are at the edges

• Converging lenses can produce images which are both magnified and reduced in size.

• The images formed by a converging lens can be located on either side of the lens relative to the object.

• All of these

Which of the following statements are true of diverging lenses?

• Diverging lenses only produce virtual images.

• Diverging lenses only produce upright images.

• Diverging lenses only produce reduced images.

• All of these

Which of the following statements are true of real images?

• Real images are inverted.

• Real images as formed by lenses are located on the opposite side of the lens from the object.

• Real images are only formed by converging lenses, never by diverging lenses.

• All of these

Which of the following statements are true of virtual images?

• Virtual images are always upright.

• Virtual images as formed by lenses are always located on the same side of the lens as the object.

• Virtual images can be formed by both converging lenses (when the object is inside of F) and diverging lenses (regardless of the object location).

• All of these