Important Question Physics Class 12 UP Board. We covered all the Important Question Physics Class 12 UP Board in this post for free so that you can practice well for the exam.
Install our MCQTUBE Android app from the Google Play Store and prepare for any competitive government exams for free.
These types of competitive MCQs appear in the exams like MHT-CET, NEET, JEE (Mains), and other Competitive Examinations, etc. We created all the competitive exam MCQs into several small posts on our website for your convenience.
You will get their respective links in the related posts section provided below.
Related Posts:
- Nootan Class 12 Physics Solution
- Nageen Prakashan Physics Class 12
- Physics Question Bank Solution Class 12
Important Multiple Choice Questions of Physics Class 12 UP Board for Students
A ray of light is incident on a glass slab with a refractive index of 1.5 making an angle of 40° with the surface. The angle of refraction in glass is
(A) 30° 42′
(B) 35° 42′
(C) 19° 28′
(D) 35° 36′
Option a – 30° 42′
A ray of light is incident on the surface of a glass plate of refractive index 1.55 at the polarising angle. The angle of refraction is
(A) 32° 49′
(B) 35° 16′
(C) 159 49′
(D) 67°
Option a – 32° 49′
When a source of light is receding away from an observer, then the spectral lines will get displaced towards
(A) violet region
(B) blue region
(C) ultraviolet region
(D) red region
Option d – red region
Two mirrors are placed perpendicular to each other. A ray strikes the first mirror and after reflection from the first mirror it falls on the second mirror. The ray after reflection from the second mirror will emerge :
(A) perpendicular to the original ray
(B) parallel to the original ray
(C) at 45° to the original ray
(D) at 60° to the original ray
Option b – parallel to the original ray
Two Nicol prisms are placed with their principal planes at 60°. What percentage of light incident on the combination is transmitted?
(A) 10 %
(B) 25 %
(C) 12.5 %
(D) 70 %
Option c – 12.5 %
Air has a refractive index of 1.0003. The thickness of the air column which will have one more wavelength of yellow light (6000 A° ) than in the same thickness of vacuum is :
(A) 1 mm
(B) 3 mm
(C) 2 mm
(D) 4 mm
Option c – 2 mm
An air bubble inside a glass slab appears to be 6 when viewed from one side and 4 cm deep when viewed from the opposite side. If the refractive deep glass is 1.5, then the thickness of the glass index of the slab is :
(A) 9 cm
(B) 15 cm
(C) 6 cm
(D) 3 cm
Option b – 15 cm
Light of a certain wavelength is incident normally on a glass plate of thickness 6 cm and refractive index of 1.5. The light takes the same time to travel from the source to the incident surface as it takes to travel through the slab. What is the distance of the source from an incident surface :
(A) 8 cm
(B) 9 cm
(C) 10 cm
(D) 11 cm
Option b – 9 cm
A ray of light is incident on a glass block such that the reflected ray is completely polarised. The refracted beam suffers a deviation of 26° from its original path in the air. What is the refractive index for glass?
(A) 1.33
(B) 1.6
(C) 2.4
(D) 1.875
Option b – 1.6
The refractive index of glass and that of water are 3/2 and 4/3 respectively. By what fraction would the wavelength of light change if it goes from glass to water :
(A) 1.25
(B) 0.125
(C) 3.25
(D) 1.43
Option b – 0.125
Light of a certain wavelength is incident on a glass slab of refractive index 1.6 making an angle of incidence 50°. If the thickness of the glass is 3 cm, what is the distance it will cover in glass :
(A) 4 cm
(B) 3 cm
(C) 4.619 cm
(D) 3.416 cm
Option d – 3.416 cm
We covered all the important question physics class 12 up board above in this post for free so that you can practice well for the exam.
Check out the latest MCQ content by visiting our mcqtube website homepage.
Also, check out:
