The ray is incident at an angle of incidencethat is greater than the critical angle. Transmission of a wave into the second medium at an interface is called refraction. In this process it bends away from the normal . Numerical on Light Class 10. Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. air water i r Incident ray Refracted ray normal 11. Hence, medium with highest refractive index will have the highest optical density and vice-versa. Lateral shift is directly proportional to the thickness of glass slab. This allows long distances to be spanned with few repeaters. Nonlinear optics (NLO) is the branch of optics that describes the behaviour of light in nonlinear media, that is, media in which the polarization density P responds non-linearly to the electric field E of the light. RS Aggarwal Solutions for class 7 Math's, lakhmirsingh Solution for class 8 Science, PS Verma and VK Agarwal Biology class 9 solutions, Lakhmir Singh Chemistry Class 9 Solutions, CBSE Important Questions for Class 9 Math's pdf, MCQ Questions for class 9 Science with Answers, Important Questions for class 12 Chemistry, Some Important Terms Used In The Reflection Of Light, Some Important Terms Related To Spherical Mirrors, Principal Focus And Focal Length Of A Convex Lens, Principal Focus And Focal Length Of A Concave Lens, Sign Convection For Refraction By Spherical Lenses, Important Questions CBSE Class 10 Science. air water i r Incident ray Refracted ray normal 11. A) A done clear. … NCERT Solutions For Class 10. NCERT solutions for class 10 science chapter 10 Light Reflection and Refraction Topic 10.2 Spherical Mirrors . → Cause of refraction: Change in speed of light. Optical media - such as the compact disk ( CD ) - are storage media that hold content in digital form and that are written and read by a laser ; these media include all the various CD and DVD variations, as well as optical jukeboxes and autochangers. Now, let us understand the phenomenon of optical density and its effect on the light passing via a medium by comparing the two media. Optical density is the process of transmission of light or other electromagnetic radiation by matter. Because of this when a pencil is dipped in a glass of water, it seems to be bent just at the surface separating the … Optical density of a substance is different from its mass density. An object of length 2.5cm is placed at a distance of 1.5f from a concave mirror where f is the focal length of the mirror. It is possible that mass density of an optically denser medium may be less than that of an optically rarer medium (optical density is the ratio of the speed of light in two media). But not every medium is a uniform medium, and the fact that air can sometimes form a non-uniform medium leads to an interesting refraction phenomenon - the formation … It states that for each and every object, there is an image. Refractive Index Formula. Therefore, the light bends towards the normal as you can see in the image below: It tells us that the glass is optically denser than air. Lateral shift is the perpendicular distance between the incident and emergent rays when light is incident obliquely on a refracting slab with parallel faces. Free PDF Download of CBSE Class 10 Science Chapter 10 Light Reflection and Refraction Multiple Choice Questions with Answers. The optical density of a medium is not the same as its physical density. LIGHT OPTICAL DENSITY Light speeds up when it enters an optically less dense medium. MCQ Questions for Class 10 Science with Answers was Prepared Based on Latest Exam Pattern. Q.1 Define the principal focus of a concave mirror.. Answer: It is the point on the principal axis where a beam of light parallel to the principal axis after reflection actually meets. Ans: Optical density (O.D.) Absorption of any material is taken as A given by, AU = - log₁₀ (Φ t / Φ i) = - log₁₀ T…(1). 245 Views Q2: What does Higher Optical Density Mean? A ray AE is incident on the face PQ at an angle of incidence I. 2. Critical angle of glass is θ 2 and that of water is θ 2. The absorption unit is basically used in ultraviolet-visible spectroscopy where AU is a dimensionless quantity denoted by AU. 1. air are given. Optical Density and the Index of Refraction Like any wave, the speed of a light wave is dependent upon the properties of the medium. Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror. = 2 (Here, the optical density is equal to 2). It is more for violet light and less for red light (VIBGYOR). • Some examples of refraction → The bottom of swimming pool appears higher. T is the transmittance. Optical density of a medium is the ability of that medium to refract light. It is especially advantageous for long-distance communications, because infrared light propagates through the fiber with much lower attenuation compared to electricity in electrical cables. For example, between the two media, glass and water, glass having a higher refractive index is an optically denser medium than water which has a lower refractive index and hence is an optically rarer medium. The physical density of a material refers to the mass/volume ratio. The refraction of light occurs because light has different speed in different media. Find out from the table below, the medium havine highest optical density. Lateral shift is inversely proportional to the wavelength of incident light. It is denoted by T. The ratio of radiant flux transmitted by the material (Φt) to the radiant flux (Φi) received by that surface known as the Transmittance (T). Human Eye and Colourful World. In which of these does the light travel fastest? The emergent ray FD bends away from the normal at an angle of refraction e. Thus the emergent ray FD is parallel to the incident ray AR, but it has been laterally displaced with respect to the incident ray. Question 14. Zigya App. Basically, the physical density would be the ratio of mass to the volume, and optical density measures the speed of light while passing through an optically dense medium. It is less in any other medium. An optical density is defined as an equation given by. Name the optical phenomenon involved in the formation of rainbow. We consider the capital cost of a Class 10.1 vehicle to be $30,000 plus the related GST/HST, or PST. The O.D value for absorbance can be computed by the formula given by. Refraction Class 10 Extra Questions with Answers Science Chapter 10 20″> Air has lowest refractive index (= 1.0003), so it has lowest optical density. Optimal optical density (OD) values for reliable measurements must be lower than 2. Optical medium is sort of a transmission medium i.e., a medium of propagation. A beam of light of wavelength 6000 A° enters in the medium from air. Define the principal focus of a concave mirror. MCQ Questions for Class 10 Science: Ch 10 Light Reflection and Refraction (a) Light travels from rarer to denser medium. RMO ... and optical density measures the speed of light while passing through an optically dense medium. Here, the ray of light from the coin travels from a denser medium to a rarer medium . Denser in the medium lesser is the speed of light. NCERT Solutions for Class 10 Social Science; NCERT Solutions for Class 10 Maths.
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