Subject: Physics, asked 3 days ago

## please solve this physics crossword as fast as possible

Subject: Physics, asked 3 days ago

## please solve this crossword as fast as possible

Subject: Physics, asked 6 days, 17 hours ago

## please solve this crossward as fast as possible

Subject: Physics, asked 1 week, 3 days ago

## Playing with an old lens one morning, Ravi discovers that if he holds the lens 10 cm away from a wall opposite to a window he can see a sharp but upside down image of outside world on the wall. That evening he covers a lighted lamp with a piece of opaque paper on which he has pierced a small hole 1 mm in diameter. By placing the lens between the illuminated paper and the wall, he manages to produce a sharp image of diameter 5 mm on the wall. 1. What is the nature of the lens? 2. What is the focal length of the lens? 3. Calculate the power of the lens. 4. In the evening experiment how far from the opaque paper did he place the lens? 5. How far apart were the illuminated paper and the wall?

Subject: Physics, asked 2 weeks, 5 days ago

## A 6 cm object is placed perpendicular to the principal axis of a convex lens of focal length 15 cm. The distance of the object from the lens is 10 cm. Find the position, size and nature of the image formed, using the lens formula.

Subject: Physics, asked 4 weeks ago

## An object 20 cm from a spherical mirror gives rise to a virtual image 15 cm behind the mirror. The type of the mirror and its focal length is(a) concave, 8.5 cm(b) convex, 30 cm(c) concave, 60 cm(d) convex, 60 cm.

Subject: Physics, asked 4 weeks, 1 day ago

## Consider the case, in which a mirror forms a real image of height 4 cm of an object of height 1cm placed 20 cm away from the mirror. 1. The distance from the object to its image is (a) 20 cm (b) 80 cm (c) 60 cm (d) 70 cm 2. The focal length of mirror is (a) -16 cm (b)12 cm (c) -15 cm (d) 10 cm 3. The radius of curvature of the mirror is (a) -16 cm (b) -14 cm (c) -30 cm (d) -32 cm 4. The magnification of the image is (a) 3 (b) -6 (c) -4 (d) 8 5. At what distance must an object be placed from mirror in order that a real image double its size may be obtained? (a) -24 cm (b) 32 cm (c) -40 cm (d) 45 cm

Subject: Physics, asked 1 month ago

## An object 4 cm high is placed at a distance of 15 cm in front of a convex mirror having a radius of curvature of 10 cm. Then the image formed is at a distance of?

Subject: Physics, asked 1 month ago

## Choose the wrong statement.(a) A concave mirror can form a magnified real image.(b) A concave mirror can form a magnified virtual image.(c) A convex mirror can form a diminished virtual image.(d) A convex mirror can form a diminished real image. PLS ANSWER ASAP

Subject: Physics, asked on 13/4/21

## Experts solve only option2

Subject: Physics, asked on 13/4/21

## A concave mirror forms a sharp image of a distant tree. What name is given to the distance between the concave mirror and screen on which sharp image is formed?

Subject: Physics, asked on 12/4/21

## state the formula to find sea length

Subject: Physics, asked on 12/4/21

## A spherical mirror is used to obtain an image on a screen. The height of the image is 5 times that of the object. What is the type of mirror and at what distance is the object placed from the mirror?

Subject: Physics, asked on 12/4/21

## With a neat labelled diagram explain how the image of an extended object source is formed by a plane mirror.

Subject: Physics, asked on 11/4/21

## The speed of light in air is 3 ?10 m s/, whereas that of the speed of light in water is 2.6 8 ? 10 . What is the refractive index of water with respect to air?

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