What is the shape of the wavefront in each of the following cases:(a) Light diverging from a point source.(b) Light emerging out of a convex lens when a point source is placed at its focus.(c) The portion of the wavefront of light from a distant star intercepted by the Earth.

Q: Is the speed of light constant? Explain with optical and physical relations

A: By concept and according International standards the speed of light in vacuum is determined to be…

Q: A telescope has an upward-pointing concave mirror of focal length 40 cm which, every night, collects…

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Q: When viewing through a compound microscope, our eyes should be positioned not on the eyepiece but a…

A: If our eye cannot collect much reflected light due to improper positioning of eye piece. It may be…

Q: Give the position of the screen (xS) that shows the focused image, for these numbers:

A:

Q: When laser light is shone into a relaxed normal-vision eye to repair a tear by spot-welding the…

A: The human eye forms image onto retina of a distant object. The lens of an eye is a converging lens.…

Q: The lens of the human eye is converging. Do you anticipate the picture created on the retina to be…

A: The image formed by the converging lens on retina is real and inverted. Also if the object is…

Q: If a person covers the top half of camera lens, what effect does this have on the pictures taken?

A: If we cover the half of the lens, then we get a fainter image or an image with less itensity of…

Q: What is the vertical length of the smallest plane mirror in which a man 2 m tall can just see his…

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Q: Light from a point source in air falls on a spherical glass of u 1.5 and R = 0.2m. The image is…

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Q: Refraction causes objects submerged in water to appear less deep than they actually are. The fish in…

A: Given apparent depth=1.3m and we have to find the Actual depth.

Q: Refraction causes objects submerged in water to appear less deep than they actually are. The fish in…

A: Given : Apparent Depth = 1.19 m Hence, The value of actual depth is    2.15 m (approx.)

Q: In an experiment to discover the index of refraction for an unknown material, the index was…

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Q: Why does a straw in a glass of water look bent? Why does a small glass beaker in a larger glass…

A: Given : Asked teo questions: 1) Why does a straw in a glass of water look bent? 2) Why does a small…

Q: When you look at a fish in a still stream from the bank, thefish appears shallower than it really is…

A: Fish in a tank

Q: A converging lens form a virtual image of a real object, when the ___ is ___ the ___ from the lens?…

A: To explain : When does a converging lens produce virtual image of a real object.

Q: Suppose a student is looking closely at an object inside a container containing a liquid of…

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Q: A stick portly submerged obliquely in water appears to be bent at a point where it enters the water…

A: This is due to refraction of light. Refraction phenomena happens because of the difference in value…

Q: The distance an object is from a diverging lens is changed by a factor of 5.8, by what factor does…

A: Given: distance of an object is changed by a factor of 5.8  Find : By what factor does the angular…

Q: In the Newton's Rings apparatus, the light of 600nm and convex-planar lens of radius of curvature…

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Q: When a light ray encounters a dense-rare boundary at an angle equal to critical angle, then O a. the…

A: When the incident ray angle is equal to critical angle then light ray travel along the boundary.

Q: A convex lens made of glass, with refractive index (), is placed in a medium of refractive index.A…

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Q: Why is an object in water always appear to be at a depth shallower than it actually is?

A: When light ray falls on surface of varying medium, it produces phenomenon such as reflection and…

Q: A light beam is incident from air on one end of glass fibre by an angle of 12∘,as shown in the…

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Q: The spoon appears to be broken where it enters the water because a) the light is reflected by the…

A: Refraction is an optical phenomenon where when a light ray travels between two mediums, then the…

Q: Suppose a student is looking closely at an object inside a container containing a liquid of…

A: Given that: l=57 cmRE=13 cmRS=28 cmn=1.3 d=21 cmn'=1.9r=72 cm Find the position of the image…

Q: What is the speed of light in air? In crown glass?

A: Speed of light in air is C.  And  C= 2.99×10^8 meter/sec.

Q: 2. A layer of water of refractive index 4/3 is on top of a layer of glass of refractive index 3/2. A…

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Q: When a light ray encounters a dense-rare boundary at an angle lesser than the critical angle, then…

A: Correct option is C. Explanation with figure is given in next step.

Q: The place you get your hair cut has two nearly parallel mirrors 7.0 mm apart. As you sit in the…

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Q: Refraction causes objects submerged in water to appear less deep than they actually are. The fish in…

A:

Q: Refraction causes objects submerged in water to appear less deep than they actually are. The fish in…

A: We know that real depth /appearent depth = refractive index of the medium in which body is immersed.

Q: A small object faces the convex spherical glass window of a small wate curvature of the window is…

A: Given:- The object distance is u = -30 cm  The radius of curvature of the glass R = 5 cm  the…

Q: Refraction causes objects submerged in water to appear less deep than they actually are. The fish in…

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Q: When a fish looks up at an angle of 45 degrees with the horizon, does it see the sky or the…

A: The incident light from the sky travels through the air and when it enters the water medium it gets…

Q: Rowan is walking in a shallow, clear bay, in still water just over her knees. When she looks down at…

A: It is given that, d=0.60 m D=1.60 m nW=1.33

Q: When a light ray encounters a dense-rare boundary at an angle lesser than the critical angle, then O…

A: When a light ray incident from a denser to rare medium the ray bent away from the normal and the…

Q: When a converging lens is used in a camera, the film must be placed at a distance of 0.210 m from…

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Q: Two converging lenses (f - 9.30 cm and f,-4.20 cm) are separated by 20.0 cm. The lens on the left…

A: Given : Focal length f1 = 9.30 cm             Focal length f2 = 4.20 cm             Separated by 20…

Q: Light enters air from water. The angle of refraction will be O greater than the angle of incidence.…

A: Light enters air from water . To find = Angle of refraction

Q: A camera lens has a magnification of -0.01.  The distance between the lens and the film is 2 cm.…

A: The magnification of the lens m=-0.01  The image is formed on the lens .Therefore the image distance…

Q: Lenses used in eyeglasses, whether converging or diverging,are always designed such that the middle…

A: Lenses in eyeglasses are either converging or diverging depending on whether the patient is…

Q: Identical rays of light in air are refracted upon entering three transparent materials: A, water,…

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Q: 19.) An incident light passes through an aquarium, which is from glass to water. Which of the…

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Applications Of Reflection Of Light

When a light ray (termed as the incident ray) hits a surface and bounces back (forms a reflected ray), the process of reflection of light has taken place.

Sign Convention for Mirrors

A mirror is made of glass that is coated with a metal amalgam on one side due to which the light ray incident on the surface undergoes reflection and not refraction.