# Ray Optics and Optical Instruments CBSE Class 12 Physics MCQ Questions with Answer Keys

If you are preparing for CBSE Class 12 Board Exam Term 1 which will be an objective type questions paper, then you need to practice multiple choice questions of Class 12 Physics Chapterwise. In this article of AKVTutorials, you will get Ray Optics & Optical Instruments CBSE Class 12 Physics MCQ Questions with Answer Keys Solutions.

MCQ Questions for Class 12 Physics Chapter 9 Question No 11:

The focal length of a concave mirror is 50 cm. Where an object be placed that its image is two times and inverted:

Option A : 75 cm

Option B : 150 cm

Option C : 50 cm

Option D : 25 cm

Option A : 75 cm

MCQ Questions for Class 12 Physics Chapter 9 Question No 12:

An object is placed 40 cm from a concave mirror of focal length 20 cm. The image formed is:

Option A : Real and upright

Option B : Real and inverted

Option C : Virtual and upright

Option D : Virtual and inverted

Option B : Real and inverted

MCQ Questions for Class 12 Physics Chapter 9 Question No 13:

For total internal reflection to occur, ray must travel

Option A : Rarer medium to denser medium

Option B : Denser medium to rarer medium

Option C : From any medium

Option D : From air to water

Option B : Denser medium to rarer medium

MCQ Questions for Class 12 Physics Chapter 9 Question No 14:

A cut diamond sparkles because of its:

Option A : Hardness

Option B : High refractive index

Option C : Emission of light by the diamond

Option D : Absorption of light by the diamond

Option B : High refractive index

MCQ Questions for Class 12 Physics Chapter 9 Question No 15:

What is the magnification and focal length of a plane mirror?

Option A : 1, Infinity

Option B : 1 ,0

Option C : 0, Infinity

Option D : None

Option A : 1, Infinity

MCQ Questions for Class 12 Physics Chapter 9 Question No 16:

Two lenses of focal length 20 cm and -40cm are held in contact. If an object lies at infinity , image forward by the lens combination will be  at:

Option A : Infinity

Option B : 20 cm

Option C : 40 cm

Option D : 60 cm

Option C : 40 cm

MCQ Questions for Class 12 Physics Chapter 9 Question No 17:

The characteristic feature of light which remains unaffected on refraction is:

Option A : Speed

Option B : Frequency

Option C : Wavelength

Option D : Velocity of light

Option B : Frequency

MCQ Questions for Class 12 Physics Chapter 9 Question No 18:

If the critical angle for total internal reflection from a medium to vacuum is 300. the velocity of light in the medium is

Option A : 3 × 108 m/s

Option B : 2 × 108 m/s

Option C : 1.5 × 108 m/s

Option D : 6 × 108 m/s

Option C : 1.5 × 108 m/s

MCQ Questions for Class 12 Physics Chapter 9 Question No 19:

A convex lens of focal length 40cm is in contact with a concave lens of focal length 25 cm. The power of the combination in diopter is:

Option A : -6.5

Option B : -1.5

Option C : +1.5

Option D : +6.5

Option B : -1.5

MCQ Questions for Class 12 Physics Chapter 9 Question No 20:

The focus length of an equi-convex lens in air is equal to either of its radii of curvature. The refractive index of the material of the lens is:

Option A : 4/3

Option B : 2.5

Option C : 1.5

Option D : 1.25

Option C : 1.5

CBSE Class 12 Physics Chapterwise MCQ
1 : Electric Charge & Fields MCQs
| 1 to 10 | 11 to 20
2 : Electrostatics Potential and Capacitance MCQs
| 1 to 10 | 11 to 20
3 : Current Electricity MCQs
| 1 to 10 | 11 to 20
4 : Moving charges and Magnetism MCQs
| 1 to 10 | 11 to 20
5 : Magnetism and Matter MCQs
| 1 to 10 | 11 to 20
6 : Electromagnetic Induction MCQs
| 1 to 10 | 11 to 20
7 : Alternating Current MCQs
| 1 to 10 | 11 to 20
8 : Electromagnetic Waves MCQs
| 1 to 10 | 11 to 20
9 : Ray Optics and Optical Instruments MCQs
| 1 to 10 | 11 to 20
10 : Wave Optics MCQs
| 1 to 10 | 11 to 20
11 : Dual Nature of Radiation MCQs
| 1 to 10 | 11 to 20
12 : Atoms MCQs
| 1 to 10 | 11 to 20
13 : Nuclei MCQs
| 1 to 10 | 11 to 20
14 : Semi Conductor Electronics MCQs
| 1 to 10 | 11 to 20
15 : Communication Systems MCQs
| 1 to 10 | 11 to 20