A hypothetical atom has atomic number 56. Using the Bohr hypothesis, find the frequency of revolution for the electron in the 63th energy level, in Hz.

Q: Difference between  image in mirror and lenses

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Q: Determine the height of the tree using the method in the image, if you are at a distance d = 25.2 m,…

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Q: A

A: Option A ) A is right answer. Explanation Condition for critical angle: a light ray is in the more…

Q: A lens creates an image that has a magnifica The lens is convex. The lens is concave. The image is…

A: Lens creates an image that has a magnification of -.4 So magnification M = -0.4

Q: 5. How far would an object need to be placed from a mirror of focal length 10.0 cm if it is image…

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Q: by use Positive lens O false O true

A: A convex lens is also called a positive lens, since the focal length is positive, whereas a concave…

Q: Match the answers with questions for image distance - s'.…

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Q: The vision defect in which the lens of the eye become too long is called a.Image defect…

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Q: 28. What type of lense is this? parallel light rays focal point axis аxis focal length A. Concave B.…

A: 28. In the given ray diagram, all the rays are converging at focal point.

Q: What is focal length of a lens?

A: Focal length of a lens is a measure of how strongly the lens converges or diverges light. It is the…

Q: Image ke Object ↑ Jy €6.00> - L L- Optic axis Lens

A: given distance of images from lens= v= -(6+L)cm distance of object from lens= u =-L cm Height of…

Q: 11) A convex mirror has a focal length of ( -8) cm. If an object is placed 15 cm from the surface,…

A: Given data:     Focal length, f = -8 cm     Distance of the object, do = 15 cm

Q: A convex mirror has focal length of 20 cm. An object is placed 10.0 cm in front of the mirror.…

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Q: If the power of a corrective lens is +2.0 D, then it is a   A) convex lens B) concave lens C)…

A: Given that, Power = +2.0 D

Q: +Q 庄 土 土 土 C. E王 王 土 D.

A: The like charge particles always repel each other while the unlike charge particles attract each…

Q: Concave mirrors cause an incoming parallel light beam to converge  True  False

A: A concave mirror has the reflecting surface which caves inwards. Examples of concave mirrors are the…

Q: vision

A: Option c is the right answer  Farsightedness

Q: Draw a ray diagram & draw the image formed.

A: The lens given in the problem is a concave lens, which forms only virtual images of objects placed…

Q: Determine focal length and magnification given radius of curvature, distance of object and image.

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Q: Points of Differences Plane Concave Convex Description/shape of the mirror. Flat surface Size of the…

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Q: 5. What is an example of a real image? *

A: An image, which is formed when the light rays coming from an object intersect at a location after…

Q: calculate the tank Peressure. atm ม Air 100mm 100mm1 960mm Hy virg ну mercury mercury

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Q: 22. Which ray diagram shows a virtual image? 2F 2F 2F 2F O Left O Centre O Right None

A: Answer (left) An image is said to be virtual if it is formed on the side of object i.e. on left side

Q: Calculate the power of lens, which has positive focal length of 20 cm

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Q: Describe the image being produced by a plane mirror.

A: 1. Image formed by plane mirror is of same size as of object. 2. Image is formed behind the mirror…

Q: What are the types of mirror

A: A mirror is a smooth surface on which regular reflection takes place. Mirrors are of two types, 1…

Q: B- as = Hol + H0E0 dt Hol + HoEo %3D

A: Electric flux is the number of electric lines entering normally through a surface

Q: Investigate different types of microscopes.Learn how image is formed in a compound microscope.

A: The most common microscope is used is a simple compound microscope. It consists of two convex…

Q: 1.How are images formed by the light rays reflected to a mirror?

A: Mirror is a glass surface which is coated with some material, which gives it reflective properties.…

Q: The diameter of the reflecting surface of a spherical mirror is called a/an A) principal axis B)…

A: The principal axis of a spherical mirror is the line passing through the center of the mirror that…

Q: The image of an object formed on the retina of the eye is  A) virtual and upright B) virtual and…

A: The lens of the eyes is convex in shape. The light rays entering the lens get converged at the…

Q: An image formed by a concave mirror on a screen is called __________? A) Virtual image B) Real image…

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