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Light and Optics Questions - All Grades

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Grade 8 Light and Optics
When the surface of a mirror curves inward, like the inside of a bowl, it is called a                .
  1. plane mirror
  2. concave mirror
  3. convex mirror
  4. diffuse mirror
Grade 8 Light and Optics
What type of radiation is visible to the human eye?
  1. Ultraviolet light
  2. Infrared light
  3. Gamma rays
  4. Visible light
Grade 5 Light and Optics
Clear glass is a translucent object.
  1. True
  2. False
Grade 9 Light and Optics
Which of the following is not true about the image formed by a concave lens?
  1. The image is formed on the same side of the object.
  2. The image is formed between the object and the lens.
  3. The image formed is always virtual, upright and diminished.
  4. The image is formed on the focal point.
Grade 8 Light and Optics
What instrument uses lenses or mirrors to focus light from distant objects?
  1. microscopes
  2. optical Fibers
  3. telescopes
  4. lasers
Grade 3 Light and Optics
A concave mirror magnifies an object.
  1. True
  2. False
Grade 11 Light and Optics
When light rays strike a surface, they bounce off in a process called                .
  1. reflection
  2. refraction
  3. diffraction
  4. interference
Grade 11 Light and Optics
What is the wavelength of microwaves of 3.0×109 Hz frequency?
  1. 0.050 m
  2. 0.060 m
  3. 0.10 m
  4. 0.20 m
Grade 8 Light and Optics
What is the main purpose of a microscope?
  1. To observe distant celestial objects
  2. To magnify nearby objects that are too small to see with the naked eye
  3. To record sounds
  4. To measure temperature
Grade 8 Light and Optics
How does a white object appear to be white?
  1. It absorbs all colors of light
  2. It emits white light
  3. It reflects all colors of light
  4. It emits all colors of light
Grade 3 Light and Optics
An object is                 when a magnifying lens is held close to it.
  1. reversed
  2. upside down
  3. magnified
  4. inverted
Grade 9 Light and Optics
An object is placed 500 cm in front of a plane mirror. What happens when it is moved 50 cm closer to the mirror?
  1. The size of the image decreases.
  2. The size of the object increases.
  3. The size of the image is larger than the size of the object.
  4. The size of the image is the same as the size of the object.
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