Optics Flashcards
(30 cards)
Which of the following describes what will happen to a light ray incident on an air-to-glass boundary?
partial reflection, partial transmission
The wave-particle duality of light means that, in the same experiment
light will act both like a wave and like a particle
Which one phenomenon demonstrates the wave nature of light?
interference effects
The photoelectric effect was discovered by:
Hertz
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 same as that before it entered glass
Parallel rays of light that hit a concave mirror will come together:
at the focal point
One phenomenon that demonstrates the particle nature of light is:
the photoelectric effect
Monochromatic light hits a piece of glass. What happens to the wavelength in the glass as the index of refraction increases?
decreases
Who formulated the theory explaining the photoelectric effect?
Einstein
Newton’s theory of light treated light as _______, while Young demonstrated that light behaved as ______ with _____ behavior:
particles, waves, interference
When the reflection of an object is seen in a plane mirror, the image is:
virtual and upright
Which of the following best describes the image of a concave mirror when the object is at a distance greater than twice the focal point from the mirror?
real, inverted and magnification less than one
When the reflection of an object is seen in a concave mirror, the image will:
may be either real or virtual
When the reflection of an object is seen in a convex mirror the image will:
always be virtual
As a monochromatic light ray is transmitted through an air-to-glass boundary, what happens to the wavelength?
decreases
If atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be changed?
Sunrise would be later and sunset would be earlier
A line representing a wave front for a wave should be drawn:
from the source to the receiver
* along the crests (or troughs) of the wave
According to present theories of light, in some experiments light seems to be:
a particle whose quantized energy depends on its velocity
Which of the following best describes the image of a concave mirror when the object’s distance from the mirror is less than the focal point distance?
virtual, upright and magnification greater than one
If a man wishes to use a plane mirror on a wall to view both his head and his feet as he stands in front of the mirror, the required length of the mirror
is equal to one half the height of the man
When light of one wavelength from air hits a smooth piece of glass at an angle, which of the following will not occur?
refraction
*dispersion
When light from air hits a smooth piece of glass with the ray perpendicular to the glass surface, the part of the light passing into the glass
will not change its wavelength
When light reflects and produces a clear image, this reflection is referred to as
specular reflection
A girl is standing in front of a concave mirror. Consider two rays of light, one from her nose and one from her mouth that are parallel as they are traveling toward the mirror. These rays will come together
at the focal point
