Chapter 9 – Ray Optics and Optical Instruments
Sahay Sir > Question Answers > NCERT Exemplar Class 12 > Physics > Chapter 9 - Ray Optics and Optical Instruments
Consider an extended object immersed in water contained in a plane through. When seen from close to the edge of the through, the object looks distorted because.
19
Nov
Consider an extended object immersed in water contained in a plane through. When seen from close to the edge of the through, the object looks distorted because. Consider an extended object immersed in water contained in a plane through. When seen from close to the edge of the through the object looks distorted because. November [...]
You are given four sources of light each one providing a light of a single colour-red, blue, green and yellow. Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90^∘. Which of the following statements is correct it the source of yellow light is replaced with that of other lights without changing the angle of incidence ?
19
Nov
You are given four sources of light each one providing a light of a single colour-red, blue, green and yellow. Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90^∘. Which of the following statements is correct it the [...]
A passenger in an aeroplane shall 1. never see a rainbow 2. may see a primary and a secondary rainbow as concentric circles
19
Nov
A passenger in an aeroplane shall 1. never see a rainbow 2. may see a primary and a secondary rainbow as concentric circles A passenger in an aeroplane shall 1. never see a rainbow 2. may see a primary and a secondary rainbow as concentric circles November 19, 2020 Category: Chapter 9 - Ray Optics [...]
A ray of light incident at an angle θ on a refracting face of a prism emerges from the other face normally. If the angle of the prism is 5^∘ and the prism is made of a material of refractive index 1.5, the angle of incidence is.
19
Nov
A ray of light incident at an angle θ on a refracting face of a prism emerges from the other face normally. If the angle of the prism is 5^∘ and the prism is made of a material of refractive index 1.5, the angle of incidence is. A ray of light incident at an angle [...]
There are certain materials developed in laboratories which have a negative refractive index, Fig. A ray incident from air (medium 1) into such a medium (medium 2) shall follow a path given by
19
Nov
There are certain materials developed in laboratories which have a negative refractive index, Fig. A ray incident from air (medium 1) into such a medium (medium 2) shall follow a path given by Fig. A ray incident from air (medium 1) into such a medium (medium 2) shall follow a path given by There are [...]
The optical density of turpentine is higher than that of water, while its mass density is lower. Fig. shows a layer of turpentine floating over water in a container. For which one of the four rays incident on turpentine in Fig., the path shows is correct ?
19
Nov
The optical density of turpentine is higher than that of water, while its mass density is lower. Fig. shows a layer of turpentine floating over water in a container. For which one of the four rays incident on turpentine in Fig., the path shows is correct ? The optical density of turpentine is higher than [...]
Show that for a material with refractive index μ ≥ 2–√, light incident at any angle shall be guided along a length perpendicular to the incident face.
19
Nov
Show that for a material with refractive index μ ≥ 2–√, light incident at any angle shall be guided along a length perpendicular to the incident face. light incident at any angle shall be guided along a length perpendicular to the incident face. Show that for a material with refractive index μ ≥ 2–√ November [...]
A myopic adult has a far point at 0.1m. His power of accomodation is 4 diopters. (i) What power lenses are required to see distant objects ? (ii) What is his near point without glasses ? (iii) What is his near point with glasses ? (Take the image distance from the lens of the eye to the retina to be 2 cm).
19
Nov
A myopic adult has a far point at 0.1m. His power of accomodation is 4 diopters. (i) What power lenses are required to see distant objects ? (ii) What is his near point without glasses ? (iii) What is his near point with glasses ? (Take the image distance from the lens of the eye [...]
The phenomena involved in the reflection of radiowaves by ionosphere is similar to
19
Nov
The phenomena involved in the reflection of radiowaves by ionosphere is similar to The phenomena involved in the reflection of radiowaves by ionosphere is similar to November 19, 2020 Category: Chapter 9 - Ray Optics and Optical Instruments , NCERT Exemplar Class 12 , Physics ,
A jar of height h is filled with a transparent liquid of refractive index μ, Fig. At the centre of the jar on the bottom surface is a dot. Find the minimum diameter of a disc, such that when placed on the top surface symmetrically about the centre, the dot is invisible.
19
Nov
A jar of height h is filled with a transparent liquid of refractive index μ, Fig. At the centre of the jar on the bottom surface is a dot. Find the minimum diameter of a disc, such that when placed on the top surface symmetrically about the centre, the dot is invisible. A jar of [...]