AP POLYCET PHYSICS Multiple Choice Questions (MCQs)
AP POLYCET - Human Eye and Colorful World - MCQs
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What is the function of the iris in the human eye?
- A) To focus light on the retina
- B) To control the amount of light entering the eye
- C) To maintain the shape of the eye
- D) To convert light into electrical signals
Answer: B) To control the amount of light entering the eye
-
Which part of the eye helps to focus light on the retina?
- A) Cornea
- B) Iris
- C) Lens
- D) Retina
Answer: C) Lens
-
What is the focal length of the human eye lens?
- A) 1 cm
- B) 2 cm
- C) 2.5 cm
- D) 10 cm
Answer: C) 2.5 cm
-
Which cells in the retina are responsible for detecting light?
- A) Rods and cones
- B) Cones only
- C) Rods only
- D) Bipolar cells
Answer: A) Rods and cones
-
What causes the phenomenon of scattering of light?
- A) Refraction
- B) Diffraction
- C) Reflection
- D) Small particles in the atmosphere
Answer: D) Small particles in the atmosphere
-
Why does the sky appear blue during the day?
- A) Because of the scattering of light
- B) Because of the reflection of blue light from the oceans
- C) Because of the reflection of green light
- D) Because of the absorption of sunlight
Answer: A) Because of the scattering of light
-
What is the phenomenon of total internal reflection used in?
- A) Mirrors
- B) Fiber optics
- C) Glass windows
- D) Solar cells
Answer: B) Fiber optics
-
What color is formed when red and green light are mixed?
- A) Blue
- B) Yellow
- C) Cyan
- D) White
Answer: B) Yellow
-
Which of the following is the reason for the reddish appearance of the sky during sunset?
- A) Diffraction of light
- B) Reflection of light from clouds
- C) Scattering of shorter wavelengths of light
- D) Scattering of longer wavelengths of light
Answer: D) Scattering of longer wavelengths of light
-
What is the angle of deviation when light passes through a prism at the minimum deviation angle?
- A) 0°
- B) 15°
- C) 30°
- D) Minimum
Answer: D) Minimum
-
The defect in the human eye where distant objects appear blurred is known as:
- A) Myopia
- B) Hypermetropia
- C) Astigmatism
- D) Cataract
Answer: A) Myopia
-
What type of lens is used to correct hypermetropia?
- A) Convex lens
- B) Concave lens
- C) Cylindrical lens
- D) Bifocal lens
Answer: A) Convex lens
-
Which color of light has the shortest wavelength?
- A) Red
- B) Blue
- C) Green
- D) Violet
Answer: D) Violet
-
What is the main cause of the rainbow effect?
- A) Reflection
- B) Refraction
- C) Diffraction
- D) Dispersion
Answer: D) Dispersion
-
What part of the eye allows us to see in dim light?
- A) Rods
- B) Cones
- C) Retina
- D) Lens
Answer: A) Rods
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