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Q 1/50
Score 0
What is an event in which a planet’s poles are most extremely inclined toward or away from the star it orbits?
120
solstice
equinox
moonrise
moonset
Q 2/50
Score 0
What is created if light cannot get through an object and the surface on the other side of that object will have less light reaching it?
120
reflection
light rays
shadow
eclipse
50 questions
Q.
What is an event in which a planet’s poles are most extremely inclined toward or away from the star it orbits?
1
120 sec
Q.
What is created if light cannot get through an object and the surface on the other side of that object will have less light reaching it?
2
120 sec
Q.
What type of medium can all light pass through?
3
120 sec
Q.
What type of reflection is observed when light rays fall on a smooth surface and reflect in the same direction?
4
120 sec
Q.
What happens when two plane mirrors are placed at an angle to each other?
5
120 sec
Q.
Find the number of images when two plane mirrors are placed at an angle of 80° to each other.
6
120 sec
Q.
When parallel light rays fall on inside the curved metal, they will reflect and converge at what point?
7
120 sec
Q.
What mirror has a reflective surface that is curved inward and away from the light source?
8
120 sec
Q.
What phenomenon refers to the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another?
9
120 sec
Q.
What is the approximate index of refraction of air?
10
120 sec
Q.
If a diamond has an index of refraction of 2.4, what is the speed of light in this medium?
11
120 sec
Q.
What is the relationship between index of refraction and speed of light in a particular medium?
12
120 sec
Q.
When viewing objects from under water to air, where will light be refracted?
13
120 sec
Q.
If looking at an object in water, what is the characteristic of the image?
14
120 sec
Q.
When the spectrum of white light travel in a prism, how will the seven colored lights travel?
15
120 sec
Q.
What objects are transparent and have curved surfaces?
16
120 sec
Q.
What type of lens has a property of bringing parallel light rays closer and intersecting at the real focus?
17
120 sec
Q.
When is a secondary rainbow formed?
18
120 sec
Q.
What is the correct sequence of events in rainbow formation?
19
120 sec
Q.
What optical illusion is formed when a layer of very warm air near the ground refracts the light from the sky nearly into a U-shaped bend?
20
120 sec
Q.
What devices process light wave to enhance an image for a more clear view?
21
120 sec
Q.
What is the main component of a refracting telescope?
22
120 sec
Q.
What are the main parts of a reflecting telescope?
23
120 sec
Q.
Why are thinner sections of the sample needed for use under the microscope?
24
120 sec
Q.
What type of image is formed by prism binoculars?
25
120 sec
Q.
Study the image. What nonsurgical procedure is used to examine a person's digestive tract?
26
120 sec
Q.
What part of the human eyes acts as the outermost lens?
27
120 sec
Q.
Study the image. Which part of your eye transforms the light into electrical signals which are then sent to the brain where they are recognized as images?
28
120 sec
Q.
People with normal vision can see an object clearly without staring when the object is placed at what distance from from the eyes?
29
120 sec
Q.
How is the vision of people with myopia improved?
30
120 sec
Q.
Study the image. What type of vision is represented?
31
120 sec
Q.
What is the result if the three primary colors are mixed?
32
120 sec
Q.
Seeing objects in different colors depends on what property of light?
33
120 sec
Q.
What is the unit of light current that indicates the total amount of light emitted by the light source, no matter what direction it is?
34
120 sec
Q.
At rest, on or near the surface of the Earth, which value is equal to your gravitational force?
35
120 sec
Q.
Where does the direction of the gravitational field always pull towards the planet?
36
120 sec
Q.
How does planetary mass relate to the planet’s gravitational force?
37
120 sec
Q.
How does distance affect gravitational force?
38
120 sec
Q.
What is the force of gravitation between the earth and the sun, given that the mass of the earth=6×1024 kg and of the Sun=2×1030 kg. The average distance between the two is 1.5×1011 m.
39
120 sec
Q.
Which of the following planets is most influenced by the strength of the sun's gravittaional force?
40
120 sec
Q.
If the northern hemisphere is experiencing summer, what season is the southern hemisphere on?
41
120 sec
Q.
As the moon orbits the earth, the angle between the moon and the sun increases. What type of moon is observed?
42
120 sec
Q.
What is the rising and falling of the sea level routinely occuring on each day as associated with the moon's position?
43
120 sec
Q.
When does spring tide occur?
44
120 sec
Q.
What happens if there was no gravitational force of the moon acting on the earth?
45
120 sec
Q.
When is the summer solstice in the southern hemisphere?
46
120 sec
Q.
How many times does each of high tide and low tide occur?
47
120 sec
Q.
What is the main purpose of polarized sunglasses?
48
120 sec
Q.
What do we call the separation of white light into different colors?
49
120 sec
Q.
Earth has seasons because our planet's axis of rotation is tilted at which angle?
