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

Q: The eye can be regarded as a single refracting surface. The radius of curvature of this surface is…

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

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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 critical angle of incidence in a glass slab surrounded by air (nair = 1) is 42°. What will %3D…

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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: How can a clear object be transparent and visible at the same time?

A: When we put the pure water in a extra clear glass, it makes transparent system of glass and water.…

Q: If the aqueous humor of the eye has an index of refraction of 1.34 and the distance from the vertex…

A: We know,

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

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Q: The sun is low on the horizon (30.0° to the horizontal) while it appears to an underwater observer…

A: Angle of incidence = 90 - 30= 60oAngle of refraction = θRefractive index of air (n) = 1 Refractive…

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: Two rays traveling parallel to the principal axis strike a large plano-convex lens having a…

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

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Q: What happens to the light passing through the medium when there is a critical angle? Light…

A: Given :- light passing through the medium when there is a critical angle.

Q: Two coins are at equal distances from your eye. One is under 40 cm of water, the other under 40 cm…

A: The coin will appear closer in that medium, for which the refractive index is higher. Refractive…

Q: In a compound microscope, the object is at 15 mm left from the objective lens. The lenses are 300 mm…

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Q: A diverging lens (f = -10.5 cm) is located 20.0 cm to the left of a converging lens (f = 33.5 cm). A…

A: The focal length, The distance of the object to the diverging lens,

Q: Which of the following statements are (or could be) true? Choose all that apply. A shoe at a…

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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: 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: 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: Sunlight or starlight passing through the earth’s atmosphere is always bent toward the vertical.…

A: The figure shows that the sunlight passing through earth's atmosphere is,

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

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Q: An underwater diver discovers a large glass slab on the ocean floor. The actual thickness of the…

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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: Why will goggles allow a swimmer under water to focus more clearly on what he or she is looking at?

A: Goggles are allowed to wear because of clear vision.

Q: You are standing waist-deep in a swimming pool when you notice a penny underwater on the pool floor.…

A: When a light ray coming from denser to rarer medium then the ray refracted from the contact surface…

Q: Suppose you wanted special glasses designed to wear underwater, without a face mask. Should the…

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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: a beam of laser light, wavelength 725.3 nm in air is incidnet on a block of unknown transparent…

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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: A nearsighted eye is corrected by placing a diverging lens in front of the eye. The lens will create…

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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 light ray encounters a rare-dense boundary along the normal, then O a. the light ray will…

A: When a light ray travel from rare medium to denser medium along the normal no reflection take place.

Q: A converging lens (f = 12 cm) is located 30cm to the left of a diverging lens (f = -6 cm). A postage…

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

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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.