Astronomers often use large mirrors in their telescopes togather as much light as possible from faint distant objects. Shouldthe mirror in their telescopes be concave or convex? Explain

Q: is using a with near point 44.3 cm magnifying glass of focal length 16.4cm. Sees an at 7.8cm from…

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Q: A diverging lens has a focal length of –14.3 cm. A7.98-cm object is placed 39.5 cm from the lens.…

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Q: How does the power of a dry contact lens compare with its power when resting on the tear layer of…

A: Given:-            How does the power of a dry contact lens compare with its power when resting on…

Q: A photographer moves closer to his subject and then refocuses.Does the camera lens move farther away…

A: The lens equation connects the object distance, image distance and focal length of a lens.The lenses…

Q: Where must the film be placed if a camera lens is to make asharp image of an object far away?…

A: camera film

Q: Bill is farsighted and has a near point located 125 cm fromhis eyes. Anne is also farsighted, but…

A: Let dB and dA be the near points of Bill’s eye and Anne’s eye respectively, d be the normal near…

Q: A hobbyist inspects a nickel with a magnifying glass, as shown below. Viewed through the lens, the…

A: Given Data : The magnification of the lens is given as m = 4. The distance of nickel from the lens…

Q: A friend lends you the eyepiece of his microscope to use on your own microscope. He claims that…

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Q: A photographer focuses his camera on his subject. The subject then moves closer to the camera. To…

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Q: A student makes a microscope using an objective lens and an eyepiece. If she moves the lenses closer…

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Q: A 6.5X pair of binoculars has an objective focal lengthof 26 cm. If the binoculars are focused on an…

A: Given data: Objective focal length, fo=26 cm Object distance, u=4.0 m  Focal length of eyepiece:…

Q: Your camera’s zoom lens has an adjustable focal length ranging from 80.0 to 200 mm. What is its…

A: The expression to find the power P of the lens is, Here P is power and f is focal length of the…

Q: Suppose a certain person's visual acuity is such that he can see objects clearly that form an image…

A: The focal length of a lens is defined as half the radius of curvature of the lens , that is , f=R2 .…

Q: People who do very detailed work close up, such as jewelers, often can see objects clearly at a much…

A: "Since you have asked multiple question, we will solve the first question for you. If you  want any…

Q: A lens with a certain power is used as a simple magnifier. If the power of the lens is doubled, does…

A: Explanation:

Q: ve lens of focal length 144 cm and an eye-piece of focal length 6.0 cm. Wha is the magnifying power…

A: Magnifying power of telescope is the ratio of the angle subtended at the eye by the image to the…

Q: Turning the barrel of a 50-mm-focal-length lens on a manual-focus camera moves the lens closer to or…

A:

Q: Why must a camera lens be moved farther from the sensoror film to focus on a closer object?

A: Camera lens

Q: A person is having farsightedness vision defect because, а. the eye become too short O b. the eye…

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

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Q: How would the size and brightness of the image formed by a pinhole camera change if the camera were…

A: The light flux density of the image is,Here,  is the luminosity,  is constant, and  is the length of…

Q: A refracting telescope has an angular magnification of -83.00. The length of the barrel is 1.500 m.…

A: Given :     Angular magnification, M = -83.00     Barrel length, L = 1.500 m We have,  Angular…

Q: A person is having farsightedness vision defect because, Oa. the eye become too short O b. the lens…

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Q: What vision problem can be solved by converging lenses? Explain

A: Converging lens converges the light rays travelling parallel to the principal axis.  These lenses…

Q: Is it possible to obtain a non-inverted image with a converging spherical lens? Explain.

A: Is it possible to obtain a non-inverted image with a converging spherical lens?  Solution

Q: An astronomical telescope has an angular magnification of -409 when used properly. What would the…

A: given :  Angular magnification of the astronomical telescope,M = -409 We have, Angular…

Q: student wears eyeglasses of power P = -1.5 diopter to correct nearsightedness. The glasses are…

A: Given data The power of the eyeglasses is given as P = -1.5 diopter. The object distance is given…

Q: A 2 diopter uncorrecte telescope with an objective lens power i. Eye Piece Power: ii. Magnification…

A: GivenThe Uncorrected myope =2 DMagnification of Galilean telescope ,m=2xPower of objective lens…

Q: What is the difference between a converging lens and diverging lens? Explain.

A: Converging Lens - A lens which converge the light rays after refraction from the lens, is called…

Q: If the distance from your eye’s lens to the retina is shorterthan for a normal eye, you will…

A: For clear normal vision, the images are formed on the retina. Even if the objects are at different…

Q: What is the vergence of light at a distance of 32 cm in front of an image point (that is, before it…

A: Vergence: Vergence is defined as the angle formed between the light rays when they are not parallel…

Q: Combine thin lens equations to show that the magnification for a thin lens is determined by its…

A:

Q: A thin biconvex lens made of heavy glass (n_I = 1.89) has a focal length of 15 cm. If the radius of…

A: Given : Focal length (f) = 15 cm Object distance (u) = 1 cm

Dispersion of White Light

Snell’s law is a formula that gives a relation between the angle of incidence and angle of refraction and is given as: