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NEET - Grade 12 - Physics - Ray Optics and Optical Instruments - Introduction and Snapshot of Ray Optics and Optical Instruments - Study ref# 830

Introduction: Nature has endowed the human eye (retinal) with the sensitivity to detect electromagnetic waves within a small range of the electromagnetic spectrum. Electromagnetic radiation belonging to this region of the spectrum (wav... read more

NEET - Grade 12 - Physics - Wave Optics - Introduction and Snapshot of Wave Optics - Study ref# 833

Introduction: In 1637 Descartes gave the corpuscular model of light and derived Snell’s law. It explained the laws of reflection and refraction of light at an interface. The corpuscular model predicted that if ray of light (on refracti... read more

NEET - Grade 12 - Physics - Wave Optics - Introduction and Snapshot of Wave Optics - Study ref# 834

Following sections must be covered to understand the Wave Optics: 1. Introduction 2. Huygens Principle 3. Refraction and reflection of plane waves using Huygens Principle 4. Coherent and Incoherent Addition of Waves 5. Inte... read more

NEET - Grade 12 - Physics - Wave Optics - Target Setup for Wave Optics - Study ref# 835

Student requires to achieve the following milestones to get better grip over Wave Optics. The milestones / targets are as follows: Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chapter Test000%Sub... read more

NEET - Grade 12 - Physics - Ray Optics and Optical Instruments - Study ref# 10618

A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is (a) blue                        (b) green (c) violet                       (d) red... read more

NEET - Grade 12 - Physics - Ray Optics and Optical Instruments - Study ref# 10623

(i) What is the relation between critical angle and refractive index of a material? (ii) Does critical angle depend on the colour of light? Explain. Answer: (i) Refractive index (n) =   where, C is the critical angle. (ii) Yes, Since, ... read more

NEET - Grade 12 - Physics - Wave Optics - Study ref# 10630

Based on Huygens construction, draw the shape of a plane wavefront as it gets refracted on passing through a convex lens. Answer: According to Huygen’s principle, light is a longitudinal wave. Polarisation proves that light is not a long... read more

NEET - Grade 12 - Physics - Wave Optics - Study ref# 10634

(i) Define the term wavefront. State Huygen’s principle. (ii) Consider a plane wavefront incident on a thin convex lens. Draw a proper diagram to show how the incident wavefront traverses through the lens and after refraction focuses on t... read more

NEET - Grade 12 - Physics - Wave Optics - Study ref# 10638

Draw the intensity pattern for single slit diffraction and double slit interference. Hence, state two differences between interference and diffraction patterns. Answer: Differences:    ... read more

NEET - Grade 12 - Physics - Wave Optics - Study ref# 10639

5 Laser light of wavelength 640 nm incident on a pair of slits produces an interference pattern in which the bright fringes are separated by 7.2 mm. Calculate the wavelength of another source of light which produces interference fringes sepa... read more

NEET - Grade 12 - Physics - Wave Optics - Study ref# 10640

A beam of light consisting of two wavelengths 800 nm and 600 nm is used to obtain the interference fringes in a Young’s double slit experiment on a screen placed 1.4 m away. If the two slits are separated by 0.28 mm, calculate the least dist... read more

NEET - Grade 12 - Physics - Wave Optics - Study ref# 10643

Consider a two slit interference arrangement (shown in figure) such that the distance of the screen from the slits is half the distance between the slits. Obtain the value of D in terms of  such that the first minima on the screen fall at... read more

NEET - Grade 12 - Physics - Wave Optics - Study ref# 10644

When a plane wave front, of light, of wavelength  , is incident on a narrow slit, an intensity on a screen, suitably kept behind the slit. Name the phenomenon observed. (i) Obtain the conditions for the formation of central maxima ... read more

NEET - Grade 12 - Physics - Wave Optics - Study ref# 10645

How is linearly polarized light obtained by the process of scattering of light? Find the Brewster’s angle for air-glass interface, when the refractive index of glass = 1.5. Answer: When unpolarised light gets scattered by molecules, the scat... read more

NEET - Grade 12 - Physics - Wave Optics - Study ref# 10646

State Brewster’s law. The value of Brewster’s angle for a transparent medium is different for light of different colours. Give reason. Answer: When unpolarised light is incident on the surface two media, the reflected light gets (completely)... read more

NEET - Grade 12 - Physics - Wave Optics - Study ref# 10648

(i)State law of Malus. (ii) Draw a graph showing the variation of intensity (I) of polarized light transmitted by an analyser with angle () between polarized and analyser. (iii) What is the value of refractive index of a medium Of pol... read more

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