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What is the shape of the earth?
Seat belts are the best defense against impaired, aggressive, and distracted drivers. Which Newton’s Laws of Motion best explains why drivers should buckle up?
Prolonged exposure to UV light can cause sunburn or even skin cancer faster than exposure to visible light. Why do people get easily sunburned by ultraviolet (UV) light but not by visible light?
A. UV light has lower energy than visible light.
B. UV light has a lower frequency than visible light.
C. UV light has a longer wavelength than visible light.
D. UV light has a shorter wavelength than visible light.
Heinrich Hertz’s experiment led to the discovery of radio waves. The diagram shown below was used in his experiments to generate radio pulses. How did Hertz produce these waves?
James Clerk Maxwell studied how light behaves. how did he determine the speed of light?
A solar eclipse is a fascinating celestial event, but looking directly at the sun without proper protection can be harmful to your eyes. "How will you protect your eyes when watching a solar eclipse?
Use a pair of Polaroid sunglasses.
It refers to the ability of an organism to maintain a stable internal environment. The visible light spectrum is the section of the electromagnetic radiation spectrum that is visible to the human eye. Which among the components of visible light has the lowest frequency?
Constructive interference is a phenomenon in which two waves interact to form a wave with greater amplitude. When does total constructive interference occur?
A. When waves are in phase.
B. When total internal reflection occurs.
C. At the same time as total destructive interference.
D. When the waves are equal in amplitude and are completely out of phase.
How sun and moon halo were formed from the refraction of light?
When light shines through Ice crystals clouds
All electromagnetic waves move at the same speed through a vacuum, and the symbol c is used to represent this value. What is the speed of light in a vacuum?
What law states that an object at rest remains at rest and an object in motion remains in motion until it is acted upon by an unbalanced force?
A person will see a flash of lightning before they hear thunder. Why is the flash of lightning seen before the sound of thunder?
According to the wave model of light, what causes light to bend when it passes from one medium to another?
All electromagnetic waves move at the same speed through a vacuum, and the symbol c is used to represent this value. What is the speed of light in a vacuum?
Heinrich Hertz’s discovery of radio waves has impacted many aspects of modern life. Where are radio waves most commonly applied?
A. Construction, architecture, and engineering
B. Medical treatments, cancer prevention, and disease detection
C. Beauty magnification, technological alteration, and body modification
D. Satellite communication, phone networks, and television broadcasting.
D. Satellite communication, phone networks, and television broadcasting.
If you drop a piece of paper and a book at the same time in a vacuum tube, which will reach the bottom first?
The Davisson and Germer experiment provided crucial evidence for the wave nature of electrons. Which property of a wave was observed in the behavior of electrons in Davisson and Germer’s experiment using recrystallized nickel?
Which of the following describes how Sir Isaac Newton viewed the nature of light?
Imagine you’re learning about how objects change when they move at very high speeds. You come across the idea of “length contraction,” where objects appear shorter the faster they move. Which scientific theory introduced this concept?
.Why do we see a blue sky instead of a violet sky, even though violet light has a shorter wavelength than blue light?
A. Intensity is not the same for all colors in sunlight and the atmosphere absorbs more violet.
B. Intensity is not the same for all colors of sunlight and the atmosphere absorbs more blue.
C. Our eyes have the same sensitivity to all colors and are able to see any color.
D. All of the above
Mr. Levi dropped a 0.05kg ball from a 6-story building. How will you describe the acceleration of the ball?
Teacher Liona conducted a demonstration experiment in which colors of a rainbow is seen when light passes through a glass prism. Which property of light does it explain?
A toy capable of absorbing green light is illuminated with green light. What would be the color of the toy?
According to the theory of special relativity, what is the relationship between mass and energy?
Red appears on the top of a rainbow due to the way light is refracted, reflected, and dispersed in water droplets. Why does red appear on the top of a rainbow?