Quiz Standard 7 Answer Key
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- Explanation: The wavelength
- Explanation
- Explanation: When light enters glass, it bends or refracts
Explanation: The wavelength halved from wave A to wave B. Wavelength is the distance between corresponding peaks or troughs. 10) 
According to the electromagnetic spectrum, Gamma rays have the shortest wavelength. Therefore, Gamma rays have ______________ frequency.
Explanation: Wavelength and frequency are inversely proportional. This means that as one goes up, the other goes down. So, if the wavelength of the gamma ray is shortest, the frequency must be the highest. 11) While watching a recent science fiction movie, one Klingon spaceship blows up a Droid spaceship with a laser gun. The Klingon crew watches out the port window and covers their ears to muffle the noise from the explosion. Scientifically, this scene is inaccurate because
Explanation: Light, including lasers, can be transmitted easily through space. Sound, however, needs a medium to be transmitted, therefore, the sound of the explosion would not be transmitted back to their ship. 12) When light enters a pair of glasses, it ______________ when it hits the glass.
Explanation: When light enters glass, it bends or refracts because it slows down. This is caused by the interaction of the light with the glass particles. 13) 
On a beautiful fall day we see the trees' image in the pond. We can see the trees in the pond because of what property of light?
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