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Dispersion of Light - Quiz

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When white light passes through a triangular prism, it decomposes into seven colors of light. This indicates:

Dispersion of Light - Quiz - Quiz Questions

Assess your understanding of spectral ordering, dispersion principles, and invisible light via the following exercises.

1. When white light passes through a triangular prism, it decomposes into seven colors of light. This indicates:

A. White light is polychromatic light
B. Triangular prisms have dyeing functions
C. White light deteriorates when it meets glass
D. Only light emitted by the sun is white light

2. In the dispersion spectrum, the light with the smallest deviation angle (closest to the apex) is:

A. Violet light
B. Green light
C. Red light
D. Yellow light

3. Dispersion occurs because glass has different values for which physical quantity for light of different colors?

A. Propagation speed
B. Refractive index
C. Wavelength
D. All of the above

4. Outside of red light, there is a type of light that can heat objects but is invisible to the human eye. It is:

A. Ultraviolet
B. Infrared
C. Laser
D. X-ray

5. [True/False] The formation principle of a rainbow after rain is the dispersion of light, with water droplets acting like triangular prisms.

True
False

6. [Extension] Blue objects appear blue because:

A. It can emit blue light
B. It absorbs blue light and reflects other light
C. It reflects blue light and absorbs other light
D. Also because of dispersion

7. If a beam of red light is passed through a triangular prism, what will be seen on the wall?

A. A colored band of light
B. A red spot of light
C. A white band of light
D. Nothing

8. Although ultraviolet rays are invisible, they have a significant chemical effect and are often used for:

A. Heating food
B. Night vision goggles
C. Sterilization and disinfection
D. Broadcast communication

9. [Calculation] Given that the wavelength of red light in a vacuum is approximately $700\text{nm}$, and the speed of light $c = 3 \times 10^8 \text{m/s}$. The frequency of red light is approximately:

A. $4.3 \times 10^{14} \text{Hz}$
B. $2.1 \times 10^{11} \text{Hz}$
C. $4.3 \times 10^{11} \text{Hz}$
D. $2.1 \times 10^{14} \text{Hz}$