Ch. 16 - Intro to Light
An object is said to be this when no light transmission through it is permitted.
Opaque
This is half the radius of curvature or center of a mirror.
Focal Length
This material has a high index of refraction which helps provide it with a brilliant shine.
Diamond
When a diffraction pattern is observed, the object creating it must be made up of this.
How many Artemis missions will there be in total?
4
Which color at the end of the visible light spectrum has the longest wavelength?
Red
This is the type of mirror your sideview mirrors are made out of in your car.
Convex
This is the reason mirages form and information can travel through fiber optic cables.
Total Internal Reflection
Diffraction patterns emerge because interference. What are these two types of interference and what part of the pattern do they produce?
Constructive - Bright
Destructive - Dark
Which Artemis mission is NASA currently performing?
Artemis 2
Why does a dandelion appear yellow in white light? Is the process additive or subtractive?
Blue light wavelengths are absorbed. Green and red is reflected which is seen as yellow. This is subtractive.
Describe and object's image when the object is placed between the mirror and its focal point.
Virtual, larger, and upright
Describe an object's image when the object is placed more than twice the focal length from a convex lens.
Real, smaller, and inverted
These are made by scoring lines into glass at very small widths apart. The patterns that emerge from such objects are also found in nature and is responsible for the shifting color patterns produced by some insects and birds.
Diffraction Grating
What is the overall objective of the Artemis missions?
To begin establishing a base on the moon for science experiments and further base development
A sodium vapor lamp emits light waves with a frequency of 5.26×1014 Hz. What is the wavelength of the light?
570nm
A 1.1-m tall child is standing 6.0 m from a spherical convex mirror. The child’s image is 0.40 m behind the mirror. What is the image height?
0.073m
Diamond has an index of refraction of 2.42. When it is immersed in water, which has an index of 1.33, and light in the water enters the diamond at a 53° angle of incidence, what is the angle of refraction inside the diamond?
26 degrees
Two slits are 1.95´10-5 m apart. A red laser beam falls on the slits. A first-order bright band appears 4.42´10-2 m from the central bright band. The screen is 1.25 m from the slits. What is the wavelength of the light?
690nm
The current Artemis mission astronauts traveled further from Earth than any human being has ever been. What was this distance?
250,000 Miles
Light from hydrogen that is known to be 434nm is redshifted by 6.50% in light coming from a distant galaxy. How fast is the galaxy moving away from earth?
1.95 x 107 m/s
Shiny spheres that are placed on pedestals on a lawn are convex mirrors. One such sphere has a diamter of 40cm. A 12-cm-tall robin sit in a tree that is 1.5m away from the sphere. Where does the image of the robin appear?
-9.38cm (at only 0.75cm tall)
The index of refraction of float glass is 1.53 for violet light and 1.51 for red light. What are the speeds of these wavelengths of light in this glass?
Violet - 1.96 x 108 m/s
Red - 1.99 x 108 m/s
A certain diffraction grating has 6.00´103 lines per centimeter. The screen is 0.400 m from the grating. Monochromatic light shines on the grating, and the first-order line in the pattern is 12.9 cm from the central line. What is the wavelength of the light in nanometers?
513nm
If the 32 thrusters on the Orion capsule were to stop working halfway to the moon, what would happen to the astronauts?
They would still return to earth because they set their orbit with earth (including where they will land) when they did the trans-lunar injection while leaving Earth; however, they would not be able to do small changes to their trajectory and may not land exactly where intended.