#1
Which of the following best describes the phenomenon of refraction?
Bending of light as it passes from one medium to another
ExplanationRefraction is the bending of light when it transitions between different mediums.
#2
What happens to the speed of light when it passes from air into water?
It decreases
ExplanationThe speed of light decreases when it moves from air to water due to the change in the medium.
#3
Which property of light determines its color?
Wavelength
ExplanationThe color of light is determined by its wavelength, with different wavelengths corresponding to different colors.
#4
What is the Law of Reflection in optics?
The angle of incidence is equal to the angle of reflection
ExplanationThe Law of Reflection states that the angle of incidence is equal to the angle of reflection for a reflecting surface.
#5
Which of the following materials is most likely to have the highest refractive index?
Diamond
ExplanationDiamond typically has the highest refractive index among common materials.
#6
What is the phenomenon that causes the sky to appear blue?
Rayleigh scattering
ExplanationThe blue color of the sky is a result of Rayleigh scattering, where shorter wavelengths are scattered more.
#7
What is the main difference between constructive and destructive interference of waves?
Constructive interference increases amplitude, while destructive interference decreases amplitude.
ExplanationConstructive interference strengthens waves, increasing amplitude, while destructive interference weakens them, decreasing amplitude.
#8
What is the purpose of a lens in an optical system?
To converge or diverge light rays
ExplanationLenses in optics either converge or diverge light rays, altering their paths for various optical applications.
#9
Which optical phenomenon causes a rainbow to form when sunlight interacts with raindrops?
Refraction
ExplanationRainbows form due to refraction of sunlight in raindrops, separating light into its component colors.
#10
Which of the following correctly describes the principle behind fiber optics?
Total internal reflection
ExplanationFiber optics operate on the principle of total internal reflection for efficient light transmission.
#11
In optics, what does the term 'chromatic aberration' refer to?
The dispersion of light into its constituent colors due to the varying refractive indices for different wavelengths
ExplanationChromatic aberration is the separation of light into different colors, caused by varied refraction for different wavelengths.
#12
What is the principle behind the functioning of a polarizing filter in optics?
Selective transmission of light with a specific polarization direction
ExplanationPolarizing filters selectively allow light of a specific polarization direction to pass through.
#13
What is the Huygens-Fresnel principle in optics?
Every point on a wavefront serves as the source of secondary spherical waves
ExplanationHuygens-Fresnel principle states that each point on a wavefront acts as a source of secondary spherical waves, collectively forming the new wavefront.
#14
What is the phenomenon of dispersion in optics?
The spreading of light into its constituent colors due to different speeds for different wavelengths
ExplanationDispersion in optics involves the separation of light into its colors due to varied speeds for different wavelengths.