Physics
Why is the diffraction of sound waves more evident in daily experience than that of light wave?
19
Nov
Why is the diffraction of sound waves more evident in daily experience than that of light wave? Why is the diffraction of sound waves more evident in daily experience than that of light wave? November 19, 2020 Category: Chapter 10 - Wave Optics , NCERT Exemplar Class 12 , Physics ,
Consider a point at the focal point of a convergent lens. Another convergent lens of short focal length is placed on the other side. What is the nature of the wavefronts emerging from the final image?
19
Nov
Consider a point at the focal point of a convergent lens. Another convergent lens of short focal length is placed on the other side. What is the nature of the wavefronts emerging from the final image? Consider a point at the focal point of a convergent lens. Another convergent lens of short focal length is [...]
Is Huygen’s principle valid for longitudinal sound waves?
19
Nov
Is Huygen’s principle valid for longitudinal sound waves? Is Huygen's principle valid for longitudinal sound waves? November 19, 2020 Category: Chapter 10 - Wave Optics , NCERT Exemplar Class 12 , Physics ,
Between the primary and secondary rainbows, there is a dark band known as Alexander’s dark band. This is because
19
Nov
Between the primary and secondary rainbows, there is a dark band known as Alexander’s dark band. This is because Between the primary and secondary rainbows there is a dark band known as Alexander's dark band. This is because November 19, 2020 Category: Chapter 9 - Ray Optics and Optical Instruments , NCERT Exemplar Class 12 [...]
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 [...]