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Quiz Chapter 8: Light and Optics

10 questions · Form 1 Science Bab 8: Light and Optics

Question 1 of 10Score: 0

How does light travel through a uniform homogeneous medium such as air?

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. How does light travel through a uniform homogeneous medium such as air?

  1. In circular loops
  2. In straight lines
  3. In unpredictable zig-zag paths
  4. In continuous sine waves
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Answer: B

Light exhibits rectilinear propagation, meaning it travels in straight lines through uniform media.

2. Why is the word 'AMBULANCE' printed laterally inverted on the front of emergency vehicles?

  1. It is a legal manufacturer requirement
  2. So drivers ahead can read it correctly in their rear-view mirrors
  3. To make it easier for pedestrians to read
  4. To prevent reflection glare from headlights
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Answer: B

Rear-view plane mirrors cause lateral inversion. Printing the text backwards allows drivers ahead to read 'AMBULANCE' correctly.

3. Why does the sun appear reddish during sunset?

  1. The sun cools down rapidly during the evening
  2. Sunlight travels a longer atmospheric path, scattering away blue light and leaving longer red wavelengths
  3. The earth's core reflects heat into the horizon
  4. Clouds absorb red light and reflect green light
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Answer: B

At sunset, sunlight travels through a greater distance of atmosphere. Short blue wavelengths are scattered away, allowing longer red/orange wavelengths to reach the eye.

4. What is the imaginary line drawn perpendicular (90°) to a reflecting surface at the point of incidence called?

  1. Incident ray
  2. Reflected ray
  3. Normal line
  4. Focal axis
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Answer: C

The normal line is a line drawn perpendicular (90°) to the reflecting or refracting surface.

5. What natural optical phenomenon occurs when sunlight undergoes reflection, refraction, and dispersion inside suspended raindrops?

  1. Mirage
  2. Rainbow
  3. Solar eclipse
  4. Haze
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Answer: B

Raindrops act as miniature water prisms that refract, reflect, and disperse white sunlight into a spectrum rainbow.

6. Which color filter allows only Red light to pass through while absorbing Green and Blue light?

  1. Cyan filter
  2. Red filter
  3. Yellow filter
  4. Magenta filter
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Answer: B

A primary Red filter absorbs all visible wavelengths except red light.

7. When white light passes through a triangular glass prism, which component color refracts (bends) the most?

  1. Red
  2. Yellow
  3. Green
  4. Violet
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Answer: D

Violet light has the shortest wavelength in the visible spectrum and slows down/bends the most during dispersion.

8. What characteristic describes the image formed by a standard flat plane mirror?

  1. Real, inverted, and enlarged
  2. Virtual, upright, and laterally inverted
  3. Real, upright, and diminished
  4. Virtual, inverted, and same size
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Answer: B

Images in a plane mirror are virtual (cannot be projected on a screen), upright, laterally inverted (left-right reversed), and the same size as the object.

9. Which primary colors of light must be combined in equal intensity to produce Magenta light?

  1. Red and Green
  2. Green and Blue
  3. Red and Blue
  4. Yellow and Cyan
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Answer: C

Combining Red light and Blue light creates the secondary color Magenta.

10. What color light is produced when equal intensities of Red, Green, and Blue light overlap?

  1. Black
  2. Yellow
  3. Cyan
  4. White
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Answer: D

Red, Green, and Blue are the three primary colors of light. Mixing all three equally produces white light.

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