Q: What is the relationship between wavelength and frequency of light?
A.They are inversely proportional
B. They are directly proportional
C.They are unrelated
D. It depends on the medium the light is traveling through
Correct Option: BExplanation:
Answer: B) They are directly proportional
Explanation: The wavelength and frequency of light are related by the equation c = λν, where c is the speed of light, λ is the wavelength, and ν is the frequency.
Q: Which type of lens is thicker at the center than at the edges?
A.Convex lens
B.Concave lens
C.Plano-convex lens
D.Plano-concave lens
Correct Option: AExplanation:
Answer: A) Convex lens
Explanation: A convex lens is thicker at the center than at the edges.
Q: To correct the defect of vision called hypermetropia which lens is used to correct the defect?
A.Convex lens
B.Concave lens
C.Both concave and convex lens
D.None of the above
Correct Option: AExplanation:
due to this the image of the objects are formed behind the retina.This defect can be corrected by using convex lens.The focal length of the convex lens is used for the defect is computed as follows:
Q: According to Rayleigh's scattering law, what is the amount of scattering of light proportional to?
A.The wavelength of the light
B.The frequency of the light
C.The square of the wavelength of the light
D.The fourth power of the wavelength of the light
Correct Option: DExplanation:
Answer: D) The fourth power of the wavelength of the light
Explanation: Rayleigh's scattering law states that the amount of scattering of light is inversely proportional to the fourth power of its wavelength
Q: Does different colored light have different wavelengths and frequencies?
A.Yes
B.No
C.It depends on the medium the light is traveling through
D. It depends on the intensity of the light
Correct Option: AExplanation:
Answer: A) Yes
Explanation: Different colored light has different wavelengths and frequencies, which are responsible for their distinct colors.
Q: Which type of lens is used to correct farsightedness?
A.Convex lens
B.Concave lens
C.Plano-convex lens
D.Plano-concave lens
Correct Option: AExplanation:
Answer: A) Convex lens
Explanation: A convex lens is used to correct farsightedness by converging the light and moving the focal point forward.
Q: What is the term used for scattering when the energy of the incident and scattered beams of light is the same?
A.Elastic scattering
B.Inelastic scattering
C.Rayleigh scattering
D.Mie scattering
Correct Option: AExplanation:
Answer: A) Elastic scattering
Explanation: When the energy of the incident and scattered beams of light is the same, it is called elastic scattering.
Q: What is the angle of incidence when a ray of light is refracted at an angle of 30 degrees?
A.30 degrees
B.60 degrees
C.90 degrees
D.120 degrees
Correct Option: AExplanation:
Answer: A) 30 degrees
Explanation: The angle of incidence is equal to the angle of refraction when light passes from one medium to another medium of the same refractive index. Since the ray of light is refracted at an angle of 30 degrees, the angle of incidence is also 30 degrees.
Q: Which type of lens is used to correct nearsightedness?
A.Convex lens
B.Concave lens
C.Plano-convex lens
D.Plano-concave lens
Correct Option: BExplanation:
Answer: B) Concave lens
Explanation: A concave lens is used to correct nearsightedness by diverging the light and moving the focal point farther back.
Q: What is a plano-convex lens?
A. A lens with one flat and one convex surface.
B.A lens with one flat and one concave surface
C. A lens with two convex surfaces
D.A lens with two concave surfaces
Correct Option: AExplanation:
Answer: A) A lens with one flat and one convex surface
Explanation: A plano-convex lens has one flat surface and one convex surface.
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