An object is placed 20 cm away from a convex lens. If an image is formed 50 cm from the lens, what is the focal length of the lens?

Q: The thin lens equation below describes the relationships between the distance of an object from the…

A: In the given question, given that the relation between distance of an object from the lens and…

Q: a convex mirror has a focal length of -7.4 cm. If an object is placed 20 cm from the surface, at…

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Q: An object with height of 5 cm is placed 15 cm in front of a convex lens with focal length 10cm. What…

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Q: Magnifying power of a simple microscope is inversely proportional to the focal length of the lens.…

A: Grinding lenses of very small focal lengths is not very easy.

Q: What is the height of an image in a concave mirror

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Q: An object is placed 40 cm in front of the lens with a focal length of 50 cm. If the height of the…

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Q: An object that is 2.50 m tall is placed 8.60 m from a large mirror.  If an image is formed at a…

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Q: An object placed 30 cm in front of a converging lens forms an image 15 cm behind the lens. What is…

A: Given data: object distance p = 30 cm    image distance q = 15 cm

Q: The distance between an object and its upright image is 12.0 cm. If the magnification is 0.400, what…

A: The expression for the magnification of lens (upright image),

Q: An object is placed 35 cm from a convex lens, whose focal length is 15 cm. Find the location of the…

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Q: The focal length of a concave mirror is 2 meters. An object is positioned 8 meters in front of the…

A: The mirror equation,

Q: An object is placed 38 cm in front of a spherical mirror. The image lies 5.0 cm in front of the…

A: given data:   Object distance (u) of spherical mirror = - 38 cm Image distance (v) in front of the…

Q: A student in a physics classroom measured the distance from a convex lens (focal length of 4cm) to…

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Q: When an object 1.15 cm tall is placed 12 cm from a lens, the lens produces an upright image of the…

A: GivenHeight of the object ho=1.15 cmDistance of the object u=12 cmHeight of the image hi=5.75…

Q: If a real image is formed along the principal axis 20 cm from a concave mirror with the focal length…

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Q: An observer to the right of a mirror - lens combination sees 2 reflections of an object. One…

A: The observer is to the right of the mirror. The reflections are magnified 1.5 times i.e. m = 1.5 The…

Q: What is the angle of reflection if the angle of incidence at a plane mirror is 50°?

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Q: An object that is 25 cm in front of a convex mirror has an image located 17 cm behind the mirror.…

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Q: a convex mirror has a distance to the onject of 12cm. The distance to the image is (-4.7)cm. What is…

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Q: A 6 cm high object is placed 30 cm in front of a concave mirror with radius of curvature equal to 15…

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Q: An object is placed 40.0 cm in front of a convex mirror. If the focal length of the mirror is -22.0…

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Q: What happens if an object is closer to a concave mirror than its focal length?

A: Spherical mirrors are mirrors having curved surfaces that are painted on one of the sides. Spherical…

Q: The focal length of a concave spherical mirror is equal to 1 meter. What is the radius of curvature…

A: Focal Length = Radius of curvature / 2 Radius of curvature = Focal length x 2…

Q: The lens formula relating the image distance, p, to the focal length, f, and object distance, s, is…

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Q: An object is placed 54.5 cm in front of a convex mirror. If the focal length of the mirror is -11.0…

A: Mirror formula  (1/f) = (1/v) + (1/u)  V = image distance u = object distance f = focal length

Q: An object of size 7 cm is placed at front of a concave mirror of focal cm. At what distance from the…

A: The object height is h = 7 cm  The object distance for  the concave mirror is  u = -27 cm  The focal…

Q: A microscope with an overall magnification of 800 has an objective that magnifies by 200. What is…

A: Given: overall magnification = 800 Objective magnification = 200

Q: An object is placed 7cm from a convex mirror and the resulting image distance is 4.2cm. Calculate…

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Q: When the image of an object is seen in a plane mirror, the distance from the mirror to the image…

A: The image distance is same as the object distance for the plane mirrors. The only way to change the…

Q: The distance between an object and its upright image is d. If the magnification is M, what is the…

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Q: If the lateral magnification of an object is 1.5 and the focal length of the converging lens is 12…

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Q: A powerful magnifying glass produces a real image 4 mm from the convex lens. If the object was…

A: The Lens formula is given by  1f=1v-1u v is the image distance of an image, u is the object…

Q: The image of an object is found to be upright and reduced in size. What type of mirror and/or lens…

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Q: If the object to lens distance is 9 cm and lens to image distance is 29 cm, what is the focal length…

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Q: An object is placed 44.5 cm in front of a convex mirror. If the focal length of the mirror is -12.0…

A: Given: The distance of the object from the mirror is -44.5 cm. The focal length of the mirror is 12…

Q: What is the size of the image produced by a converging lens with a focal length of 10 cm if a 10-cm…

A: Focal length , f = 10 cm image distance , p = 20 cm size of object = 10 cm To find = size of the…

Q: A concave mirror has an object placed 20 cm in front of it. An image is formed 35 cm in front of the…

A: u = object position = - 20 by convention distance to the left of the mirror, object distance in this…

Q: An object is placed in front of a convex mirror at a distance larger than twice the magnitude of the…

A: Given : An object is placed in front of a convex mirror at a distance larger than twice the…

Q: A convex lens has a radius of curvature of 20 cm. A 36-cm high object is placed 15 cm in front of…

A: Let f be the convex lens's focal length and R be the radius of curvature. f=R2f=20 cm2f=10 cm

Q: an object at a distance of 51 cm from a concave lens has a focal length of 81 cm, so it has an image…

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Q: A 1.6-m-tall girl stands 3.2 m from a convex mirror. What is the focal length of the mirror if her…

A: We know that, Magnification (m) = Height of image Height of object= -vu   ..............(1) Given,…

Q: An object has its image formed 20 cm from a convex mirror. The height of the object is two times…

A: The mirror formula is  1f=1v+1u where, u is the distance of object, v is the distance of image.  The…

Q: A 4.0-cm tall light bulb is placed a distance of 8.3 cm from a concave mirror having a focal length…

A: Given:  height of object, ho = 4 cm  distance of object,  u = - 8.3 cm  focal length, f = - 15.2 cm…

Q: An object is positioned at the focal point of a converging lens (focal length f). How far from 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.