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Optics is the branch of physics that deals with the study of light. It is the science of light and its properties. From the ancient Greeks to modern-day physicists, optics has been a popular branch of science for centuries. In this blog post, we’ll provide you with an overview of optics multiple choice questions and answers pdf. This will help you in your studies and in your examinations.
The first thing to remember when studying optics is that light behaves in different ways. It can travel in a straight line, or it can be refracted and reflected. It can also be refracted and reflected in different materials, depending on the material’s index of refraction. In this blog post, we’ll provide you with a selection of optics multiple choice questions and answers pdf that will help you to understand these concepts better.
Another important concept to understand when studying optics is the law of refraction. This law states that when light passes from one medium to another, it will be refracted according to the ratio of the indices of refraction of the two materials. This means that if light passes from one material to another, it will bend in different directions depending on the ratio of the indices of refraction. This law of refraction is important to understand when answering optics multiple choice questions and answers pdf.
The last concept to understand when studying optics is the law of total internal reflection. This law states that when a light ray is incident upon a surface, it will be totally reflected if the index of refraction of the medium is greater than the incident angle of the ray. This law is essential to understand when answering optics multiple choice questions and answers pdf.
Now that you have an overview of optics multiple choice questions and answers pdf, it’s time to get down to the business of studying. The best way to do this is by downloading a copy of an optics multiple choice questions and answers pdf. This will give you comprehensive questions and answers to prepare you for your studies.
We hope this post has been helpful in providing you with an overview of optics multiple choice questions and answers pdf. Good luck with your studies!Multiple Choice Questions on Optics and refraction
Optics multiple choice questions and answers pdf
Q1. Among the colours mentioned below, the eye is most sensitive to colours between
(a) Red and green
(b) Orange and yellow
(c) Green and blue
(d) Yellow and green
Q2. Light appears to travel in a straight line because
(a) It consists of small particles
(b) The velocity of light is very large
(c) The wavelength of light is very small
(d) Light is reflected by the surroundings
Q3. Which of the following statements is true?
(a) The light has a greater velocity
(b) The sound has the greatest velocity
(c) Celestial objects have the greatest velocity
(d) Rocket has the greatest velocity
Q4. The speed of light in vacuum is nearly
(a) 3 × 10*10 metre/sec
(b) 3 × 10*8 metre/sec
(c) 3 × 10*8 km/sec
(d) 3 × 10*8 light years
Q5. Velocity of light is maximum in
(a) Diamond
(b) Water
(c) Vacuum
(d) Hydrogen
Q6. The speed of light will be minimum while passing through
(a) Glass
(b) Vacuum
(c) Water
(d) Air
Q7. The time taken to reach the Sunlight up to the surface of earth is approximately
(a) 4.2 sec
(b) 4.8 sec
(c) 8.3 minutes
(d) 3.6 hrs
Q8. Which of the following does not change when light travels from one medium to another?
(a) Velocity
(b) Wavelength
(c) Frequency
(d) Refractive index
Q9. Which of the following does not change when light travels from one medium to another?
(a) Velocity
(b) Wavelength
(c) Frequency
(d) Refractive index
Q10. Optical fibre works on the principle of :
(a) Total internal reflection
(b) Refraction
(c) Scattering
(d) Interference
Q11. In fibre-optic communication, the signal travels in the form of
(a) Lightwave
(b) Radio wave
(c) Microwave
(d) Electric wave
Q12. An endoscope is used by a physician to view the internal parts of a body organ. It is based on the principle of
(a) Refraction of light
(b) Reflection of light
(c) Total internal reflection of light
(d) Dispersion of light
Q13. Which one of the following reflects back more sunlight as compared to the other three?
(a) Sand Desert
(b) Paddy crop land
(c) Land covered with fresh snow
(d) Prairie land
Q14. Which of the following is used to take 3-dimensional pictures
(a) Photography
(b) Holography
(c) Radiography
(d) None of the above
Q15. ‘Raman effect’ deals with the light rays passing through
(a) Only fluids
(b) Only prisms
(c) Only diamonds
(d) All transparent medium
Q16. In human eye, light rays get transformed into neural impulses at :
(a) Cornea
(b) Pupil
(c) Retina
(d) Lens
Q17. The image formed on Retina is :
(a) Equal to object but inverted
(b) Smaller than object but straight
(c) Smaller than object but inverted
(d) Equal to object but straight
Q18. Diffusion of light in the atmosphere takes place due to :
(a) Carbon dioxide
(b) Dust particles
(c) Helium
(d) Water vapours
Q19. The colour of light is determined by its (a) Amplitude
(b) Wavelength
(c) Intensity
(d) Velocity
Q20. Which one of the colours has the longest wavelength?
(a) Green
(b) Yellow
(c) Blue
(d) Red
Q21. The light with the shortest wavelength is (a) Red
(b) Yellow
(c) Blue
(d) Violet
Q22. Which one among the following has the highest energy?
(a) Blue light
(b) Green light
(c) Red light
(d) Yellow light
Q23. The sun and the moon appear elliptical near the horizon because of :
(a) Refraction
(b) Optical illusion
(c) Interference phenomenon
(d) Their actual shape
Q24. Red light is used in traffic signals because (a) It has the longest wavelength
(b) It is beautiful
(c) It is visible to people even with bad eyesight
(d) None of the above reasons
Q25. The sky appears blue due to
(a) Diffraction of light
(b) Reflection of light
(c) Refraction of light
(d) Scattering of light
Q27. In driving a car, which type of mirror would you like to use for observing traffic at your back ?
(a) Concave mirror
(b) Spherical mirror
(c) Convex mirror
(d) Plain mirror
Q28. A dentist mirror is a
(a) Cylindrical mirror
(b) Concave mirror
(c) Convex mirror
(d) Plane mirror
Q29. Dispersion of light is possible by :
(a) Prism
(b) Convex lens
(c) Concave lens
(d) Simple mirror
Q30. An air bubble in water will act like a :
(a) Convex mirror
(b) Convex lens
(c) Concave mirror
(d) Concave lens
Q31. Which of the following lenses is used to minimise Myopia?
(a) Convex lens
(b) Concave lens
(c) Cylindrical lens
(d) None of these
Q32. The change of focal length of an eye lens is caused by action of the
(a) Pupil
(b) Retina
(c) Ciliary muscles
(d) Iris
(e) None of the above
Q33. The power of a lens is measured in
(a) dioptre
(b) aeon
(c) lumen
(d) candela
Q34. In human eye, image of object forms at (a) Cornea
(b) Iris
(c) Pupil
(d) Retina
Q35. What is the difference between reflection and refraction?
(a) Reflection occurs when light waves bounce off a surface, while refraction occurs when light waves pass through a surface and bend
(b) Reflection occurs when light waves pass through a surface and bend, while refraction occurs when light waves bounce off a surface
(c) Reflection and refraction are the same thing
(d) Reflection and refraction only occur in certain types of materials
Q36. What is the phenomenon responsible for the formation of a rainbow?
a) Refraction
b) Reflection
c) Dispersion
d) Diffraction
Q37. A concave mirror always forms an image which is:
a) Virtual and diminished
b) Virtual and magnified
c) Real and diminished
d) Real and magnified
Q38. Which of the following lenses can be used to correct myopia?
a) Convex lens
b) Concave lens
c) Plano-convex lens
d) Plano-concave lens
Q39. In which type of mirror is the image always virtual?
a) Concave mirror
b) Convex mirror
c) Plane mirror
d) All of the above
Q40. What is the minimum number of mirrors required to construct a periscope?
a) One
b) Two
c) Three
d) Four