Light is a form of:
(a) Electromagnetic radiation
(b) Sound wave
(c) Mechanical wave
(d) Thermal energy
Answer: (a) Electromagnetic radiation
The speed of light in a vacuum is approximately:
(a) 3,000 m/s
(b) 30,000 m/s
(c) 300,000 m/s
(d) 3,000,000 m/s
Answer: (c) 300,000 m/s
The phenomenon of bending of light when it passes from one medium to another is called:
(a) Reflection
(b) Refraction
(c) Diffraction
(d) Dispersion
Answer: (b) Refraction
The law of reflection states that the angle of incidence is:
(a) Greater than the angle of reflection
(b) Less than the angle of reflection
(c) Equal to the angle of reflection
(d) Inversely proportional to the angle of reflection
Answer: (c) Equal to the angle of reflection
A concave mirror curves:
(a) Inwards
(b) Outwards
(c) Upwards
(d) Downwards
Answer: (a) Inwards
The distance from the center of a lens or mirror to the focal point is called the:
(a) Radius of curvature
(b) Focal length
(c) Aperture size
(d) Principal axis
Answer: (b) Focal length
The power of a lens is measured in:
(a) Watts
(b) Joules
(c) Volts
(d) Diopters
Answer: (d) Diopters
A converging lens is also called a:
(a) Convex lens
(b) Concave lens
(c) Plano-convex lens
(d) Plano-concave lens
Answer: (a) Convex lens
The point where light rays meet or appear to meet after passing through a lens or bouncing off a mirror is called the:
(a) Focal point
(b) Principal point
(c) Aperture point
(d) Vertex point
Answer: (a) Focal point
The lens that causes light rays to diverge is called a:
(a) Convex lens
(b) Concave lens
(c) Plano-convex lens
(d) Plano-concave lens
Answer: (b) Concave lens
The human eye uses a ______ lens to focus light on the retina.
(a) Convex
(b) Concave
(c) Plano-convex
(d) Plano-concave
Answer: (a) Convex
The colored part of the human eye that controls the amount of light entering the eye is called the:
(a) Pupil
(b) Iris
(c) Cornea
(d) Lens
Answer: (b) Iris
The condition where the lens of the eye does not focus light properly on the retina is called:
(a) Nearsightedness
(b) Farsightedness
(c) Astigmatism
(d) Presbyopia
Answer: (c) Astigmatism
The property of light that determines its color is called:
(a) Intensity
(b) Wavelength
(c) Frequency
(d) Speed
Answer: (b) Wavelength
The phenomenon where light waves combine and form regions of constructive and destructive interference is called:
(a) Diffraction
(b) Refraction
(c) Polarization
(d) Interference
Answer: (d) Interference
The spreading out of light waves as they pass through a narrow opening or around an obstacle is called:
(a) Diffraction
(b) Reflection
(c) Refraction
(d) Dispersion
Answer: (a) Diffraction
The splitting of white light into its component colors is called:
(a) Diffraction
(b) Reflection
(c) Refraction
(d) Dispersion
Answer: (d) Dispersion
The bending of light waves around a barrier or through an opening is an example of the:
(a) Photoelectric effect
(b) Compton effect
(c) Doppler effect
(d) Diffraction effect
Answer: (d) Diffraction effect
The colors of the visible spectrum, in order of increasing wavelength, are:
(a) Red, orange, yellow, green, blue, indigo, violet
(b) Violet, indigo, blue, green, yellow, orange, red
(c) Red, orange, yellow, green, blue, violet, indigo
(d) Indigo, violet, blue, green, yellow, orange, red
Answer: (a) Red, orange, yellow, green, blue, indigo, violet
The lens that corrects the vision of a person with nearsightedness is a:
(a) Convex lens
(b) Concave lens
(c) Plano-convex lens
(d) Plano-concave lens
Answer: (b) Concave lens
The phenomenon where light rays bouncing off a surface follow the law of reflection is called:
(a) Refraction
(b) Diffraction
(c) Polarization
(d) Reflection
Answer: (d) Reflection
The angle of incidence is 60 degrees. What is the angle of reflection?
(a) 30 degrees
(b) 60 degrees
(c) 90 degrees
(d) 120 degrees
Answer: (b) 60 degrees
A diverging lens always forms a ______ image.
(a) Real
(b) Virtual
(c) Inverted
(d) Magnified
Answer: (b) Virtual
The law of refraction is also known as:
(a) Snell’s law
(b) Fermat’s principle
(c) Huygens’ principle
(d) Malus’s law
Answer: (a) Snell’s law
When light passes from a rarer medium to a denser medium, it bends ______ the normal.
(a) Towards
(b) Away from
(c) Along
(d) Parallel to
Answer: (a) Towards
The angle of incidence for total internal reflection to occur is:
(a) Greater than the critical angle
(b) Less than the critical angle
(c) Equal to the critical angle
(d) Irrelevant to the critical angle
Answer: (c) Equal to the critical angle
The process of separating light into its component colors using a prism is called:
(a) Reflection
(b) Refraction
(c) Diffraction
(d) Dispersion
Answer: (d) Dispersion
The angle between the incident ray and the normal is 30 degrees. What is the angle of refraction if the refractive index of the medium is 1.5?
(a) 20 degrees
(b) 30 degrees
(c) 40 degrees
(d) 45 degrees
Answer: (c) 40 degrees
The phenomenon of light waves vibrating in a single plane is called:
(a) Diffraction
(b) Reflection
(c) Refraction
(d) Polarization
Answer: (d) Polarization
The angle of incidence is 45 degrees. The angle of refraction is 30 degrees. What is the refractive index of the medium?
(a) 1.5
(b) 0.75
(c) 0.67
(d) 2.0
Answer: (a) 1.5
The phenomenon where the speed of light changes as it passes from one medium to another is called:
(a) Reflection
(b) Refraction
(c) Diffraction
(d) Dispersion
Answer: (b) Refraction
The distance between two consecutive crests or troughs of a light wave is called the:
(a) Wavelength
(b) Frequency
(c) Amplitude
(d) Period
Answer: (a) Wavelength
The bending of light waves around an obstacle or through a narrow opening is an example of the:
(a) Photoelectric effect
(b) Compton effect
(c) Doppler effect
(d) Diffraction effect
Answer: (d) Diffraction effect
The phenomenon where light waves are absorbed and re-emitted in different directions by atoms or molecules is called:
(a) Diffraction
(b) Reflection
(c) Refraction
(d) Scattering
Answer: (d) Scattering
The ability of a material to transmit light is called:
(a) Absorption
(b) Reflection
(c) Transmission
(d) Scattering
Answer: (c) Transmission
The lens that corrects the vision of a person with farsightedness is a:
(a) Convex lens
(b) Concave lens
(c) Plano-convex lens
(d) Plano-concave lens
Answer: (a) Convex lens
The angle between the refracted ray and the normal is 60 degrees. What is the angle of incidence if the refractive index of the medium is 1.5?
(a) 30 degrees
(b) 45 degrees
(c) 60 degrees
(d) 90 degrees
Answer: (a) 30 degrees
The lens with two different curvatures is called a:
(a) Cylindrical lens
(b) Spherical lens
(c) Biconvex lens
(d) Biconcave lens
Answer: (a) Cylindrical lens
The image formed by a convex mirror is always:
(a) Real and inverted
(b) Virtual and upright
(c) Real and upright
(d) Virtual and inverted
Answer: (b) Virtual and upright
The angle of incidence is 60 degrees. The angle of refraction is 45 degrees. What is the refractive index of the medium?
(a) 1.33
(b) 1.5
(c) 1.67
(d) 1.75
Answer: (a) 1.33
The lens that corrects the vision of a person with astigmatism is a:
(a) Convex lens
(b) Concave lens
(c) Cylindrical lens
(d) Spherical lens
Answer: (c) Cylindrical lens
The angle between the incident ray and the normal is 60 degrees. The angle of refraction is 30 degrees. What is the refractive index of the medium?
(a) 0.5
(b) 1.0
(c) 2.0
(d) 3.0
Answer: (c) 2.0
The lens that corrects the vision of a person with presbyopia is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (c) Bifocal lens
The angle of incidence is 30 degrees. The angle of refraction is 20 degrees. What is the refractive index of the medium?
(a) 0.67
(b) 1.33
(c) 1.67
(d) 2.0
Answer: (b) 1.33
The lens that corrects the vision of a person with both nearsightedness and farsightedness is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (c) Bifocal lens
The angle between the refracted ray and the normal is 45 degrees. What is the angle of incidence if the refractive index of the medium is 1.5?
(a) 30 degrees
(b) 45 degrees
(c) 60 degrees
(d) 90 degrees
Answer: (b) 45 degrees
The lens that corrects the vision of a person with both astigmatism and presbyopia is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (d) Cylindrical lens
The angle of incidence is 45 degrees. The angle of refraction is 60 degrees. What is the refractive index of the medium?
(a) 1.0
(b) 1.5
(c) 1.67
(d) 2.0
Answer: (c) 1.67
The lens that corrects the vision of a person with both nearsightedness and astigmatism is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (d) Cylindrical lens
The angle between the incident ray and the normal is 30 degrees. The angle of refraction is 60 degrees. What is the refractive index of the medium?
(a) 0.5
(b) 1.0
(c) 2.0
(d) 3.0
Answer: (a) 0.5
The lens that corrects the vision of a person with both farsightedness and presbyopia is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (a) Convex lens
The angle of incidence is 20 degrees. The angle of refraction is 30 degrees. What is the refractive index of the medium?
(a) 0.67
(b) 1.33
(c) 1.67
(d) 2.0
Answer: (c) 1.67
The lens that corrects the vision of a person with both farsightedness and astigmatism is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (d) Cylindrical lens
The angle between the refracted ray and the normal is 30 degrees. What is the angle of incidence if the refractive index of the medium is 1.5?
(a) 20 degrees
(b) 30 degrees
(c) 40 degrees
(d) 45 degrees
Answer: (c) 40 degrees
The lens that corrects the vision of a person with both nearsightedness and presbyopia is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (c) Bifocal lens
The angle of incidence is 60 degrees. The angle of refraction is 45 degrees. What is the refractive index of the medium?
(a) 1.33
(b) 1.5
(c) 1.67
(d) 1.75
Answer: (a) 1.33
The lens that corrects the vision of a person with both nearsightedness and astigmatism is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (d) Cylindrical lens
The angle between the incident ray and the normal is 45 degrees. The angle of refraction is 60 degrees. What is the refractive index of the medium?
(a) 1.0
(b) 1.5
(c) 1.67
(d) 2.0
Answer: (c) 1.67
The lens that corrects the vision of a person with both farsightedness and presbyopia is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (a) Convex lens
The angle of incidence is 30 degrees. The angle of refraction is 20 degrees. What is the refractive index of the medium?
(a) 0.67
(b) 1.33
(c) 1.67
(d) 2.0
Answer: (b) 1.33
The lens that corrects the vision of a person with both farsightedness and astigmatism is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (d) Cylindrical lens
The angle between the refracted ray and the normal is 20 degrees. What is the angle of incidence if the refractive index of the medium is 1.5?
(a) 10 degrees
(b) 20 degrees
(c) 30 degrees
(d) 40 degrees
Answer: (b) 20 degrees
The lens that corrects the vision of a person with both nearsightedness and presbyopia is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (c) Bifocal lens
The angle of incidence is 40 degrees. The angle of refraction is 30 degrees. What is the refractive index of the medium?
(a) 0.75
(b) 1.0
(c) 1.33
(d) 1.5
Answer: (c) 1.33
The lens that corrects the vision of a person with both nearsightedness and astigmatism is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (d) Cylindrical lens
The angle between the incident ray and the normal is 30 degrees. The angle of refraction is 40 degrees. What is the refractive index of the medium?
(a) 0.75
(b) 1.0
(c) 1.33
(d) 1.5
Answer: (c) 1.33
The lens that corrects the vision of a person with both farsightedness and presbyopia is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (a) Convex lens
The angle of incidence is 45 degrees. The angle of refraction is 30 degrees. What is the refractive index of the medium?
(a) 0.67
(b) 1.33
(c) 1.67
(d) 2.0
Answer: (b) 1.33
The lens that corrects the vision of a person with both nearsightedness and astigmatism is a:
(a) Convex lens
(b) Concave lens
(c) Bifocal lens
(d) Cylindrical lens
Answer: (d) Cylindrical lens
The angle between the refracted ray and the normal is 60 degrees. What is the angle of incidence if the refractive index of the medium is 1.5?
(a) 30 degrees
(b) 45 degrees
(c) 60 degrees
(d) 90 degrees
Answer: (a) 30 degrees
