# Optics multiple choice questions and answers pdf

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Are you looking for optics multiple choice questions and answers pdf? If so, then you’ve come to the right place. Here we provide you with an overview of optics multiple choice questions and answers pdf that you can use for your studies.

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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

(c) Green and blue

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

(c) The wavelength of light is very small

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

(a) The light has a greater 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

(b) 3 × 10*8 metre/sec

Q5. Velocity of light is maximum in ­

(a) Diamond

(b) Water

(c) Vacuum

(d) Hydrogen

(c) Vacuum

Q6. The speed of light will be minimum while passing  through­

(a) Glass

(b) Vacuum

(c) Water

(d) Air

(a) Glass

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

(c) 8.3 minutes

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

(c) Frequency

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

(c) Frequency

Q10. Optical fibre works on the principle of :

(a) Total internal reﬂection

(b) Refraction

(c) Scattering

(d) Interference

(a) Total internal reﬂection

Q11. In fibre-optic communication, the signal travels in the  form of

(a) Lightwave

(c) Microwave

(d) Electric wave

(a) Lightwave

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

(c) Total internal reﬂection of light

Q13. Which one of the following reflects back more sunlight  as compared to the other three?

(a)  Sand Desert

(c)  Land covered with fresh snow

(d)  Prairie land

(c)  Land covered with fresh snow

Q14. Which of the following is used to take 3-dimensional  pictures ­

(a) Photography

(b) Holography

(d) None of the above

(b) Holography

Q15. ‘Raman effect’ deals with the light rays passing through

(a) Only ﬂuids

(b) Only prisms

(c) Only diamonds

(d) All transparent medium

(d) All transparent medium

Q16. In human eye, light rays get transformed into neural  impulses at :

(a) Cornea

(b) Pupil

(c) Retina

(d) Lens

(c) Retina

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

(c) Smaller than object but inverted

Q18. Diffusion of light in the atmosphere takes place due to :

(a) Carbon dioxide

(b) Dust particles

(c) Helium

(d) Water vapours

(b) Dust particles

Q19. The colour of light is determined by its  (a) Amplitude

(b) Wavelength

(c) Intensity

(d) Velocity

(b) Wavelength

Q20. Which one of the colours has the longest wavelength?

(a) Green

(b) Yellow

(c) Blue

(d) Red

(d) Red

Q21. The light with the shortest wavelength is  (a) Red

(b) Yellow

(c) Blue

(d) Violet

(d) Violet

Q22. Which one among the following has the highest energy?

(a) Blue light

(b) Green light

(c) Red light

(d) Yellow light

(a) Blue 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

(a) Refraction

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

(a) It has the longest wavelength

Q25. The sky appears blue due to ­

(a) Diﬀraction of light

(b) Reﬂection of light

(c) Refraction of light

(d) Scattering 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

(c)  Convex mirror

Q28. A dentist mirror is a ­

(a) Cylindrical mirror

(b) Concave mirror

(c) Convex mirror

(d) Plane mirror

(b) Concave mirror

Q29. Dispersion of light is possible by :

(a) Prism

(b) Convex lens

(c) Concave lens

(d) Simple mirror

(a) Prism

Q30. An air bubble in water will act like  a :

(a) Convex mirror

(b) Convex lens

(c) Concave mirror

(d) Concave lens

(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

(b) Concave lens

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

(c) Ciliary muscles

Q33. The power of a lens is measured in

(a) dioptre

(b) aeon

(c) lumen

(d) candela

(a) dioptre

Q34. In human eye, image of object forms at  (a) Cornea

(b) Iris

(c) Pupil

(d) Retina

(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

(a) Reflection occurs when light waves bounce off a surface, while refraction occurs when light waves pass through a surface and bend

Q36. What is the phenomenon responsible for the formation of a rainbow?

a) Refraction

b) Reflection

c) Dispersion

d) Diffraction

c) Dispersion

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

a) Virtual and diminished

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

b) 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

c) Plane mirror

Q40. What is the minimum number of mirrors required to construct a periscope?

a) One

b) Two

c) Three

d) Four

b) Two

### Mcqs on geometrical optics class 10

Which of the following statements about light rays is correct?

A. Light rays travel in straight lines.

B. Light rays travel in curved lines.

C. Light rays can only travel in a vacuum.

D. Light rays can change their path randomly.

Answer: A. Light rays travel in straight lines.

The point of intersection of three or more light rays is called the:

A. Focal point

B. Principal axis

C. Vertex

D. Focus

Which of the following best describes the phenomenon of reflection of light?

A. Light changes direction when passing through a medium.

B. Light bounces off a surface and changes direction.

C. Light bends as it passes from one medium to another.

D. Light gets absorbed by a surface and disappears.

Answer: B. Light bounces off a surface and changes direction.

The angle of incidence is:

A. The angle between the incident ray and the normal.

B. The angle between the reflected ray and the normal.

C. The angle between the incident ray and the reflected ray.

D. The angle between the reflected ray and the refracted ray.

Answer: A. The angle between the incident ray and the normal.

When light passes from a rarer medium to a denser medium, it:

A. Bends towards the normal.

B. Bends away from the normal.

C. Does not bend.

D. Reflects completely.

Answer: A. Bends towards the normal.

The mirror used in a torchlight is an example of a:

A. Convex mirror

B. Concave mirror

C. Plane mirror

D. Spherical mirror

The image formed by a convex mirror is always:

A. Real and inverted

B. Virtual and upright

C. Virtual and inverted

D. Real and upright

Which of the following statements about lenses is true?

A. Convex lenses converge light rays.

B. Concave lenses diverge light rays.

C. Convex lenses always form virtual images.

D. Concave lenses always form real images.

Answer: B. Concave lenses diverge light rays.

The bending of light as it passes through a prism is called:

A. Reflection

B. Refraction

C. Dispersion

D. Diffusion

The color of an object we see is the color of light that the object:

A. Reflects

B. Absorbs

C. Transmits

D. Scatters

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### What is an optical fiber?

An optical fiber is a thin, flexible strand of transparent material, usually glass or plastic, that is used to transmit light signals over long distances with minimal loss of signal quality. It relies on the principle of total internal reflection.

### What is the human eye’s lens called?

The lens in the human eye is called the crystalline lens. It helps to focus light onto the retina, allowing us to see objects clearly at different distances.

### What is reflection?

Reflection is the bouncing back of light when it encounters a surface that does not absorb it. The angle of incidence (the angle at which light strikes the surface) is equal to the angle of reflection (the angle at which light bounces off the surface).

### What is refraction?

Refraction is the bending of light as it passes from one medium to another, such as from air to water or from air to glass. It occurs due to a change in the speed of light.

### What are the different types of lenses?

There are two main types of lenses: convex lenses and concave lenses. Convex lenses are thicker at the center and converge incoming light rays, while concave lenses are thinner at the center and diverge incoming light rays.

### What is light?

Light is a form of electromagnetic radiation that is visible to the human eye. It consists of particles called photons that travel in waves.

### What is optics?

Optics is the branch of physics that studies the behavior and properties of light, including its interactions with matter and the instruments used to detect and manipulate it.