A dentist's mirror has a radius of curvature of 3cm. How far must it be placed from a small dental

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A dentist's mirror has a radius of curvature of 3cm. How far must it be placed from a small dental cavity to give a virtual image of the cavity that is magnified five times?.

When an object is placed at a distance of 50cm from a concave spherical mirror the magnification produced is -1/2.Where should the object be placed to get a magnification of -1/5.
   • When an object is placed at a distance of ...  

An object is near a concave mirror of 10 cm focal length. The image is 3 cm tall, inverted and 16 cm from the mirror. What are the object position and object height?
   • An object is near a concave mirror of 10 c...  

A convex lens forms a real and inverted image of a needle at a distance of 50 cm from it. Where is the needle placed in front of convex lens if the image is equal to the size of the object? Also find the power of the lens
   • A convex lens forms a real and inverted im...  

A converging mirror forms a real image of height 4 cm of an object of height 2 cm placed 20 cm away from the mirror
i) Calculate the image distance
ii) What is the focal length of the mirror?
   • A converging mirror forms a real image of ...  

An object that is 24 mm tall is placed 12 cm from a concave mirror. Sunlight falls on the concave mirror and forms an image that is 3 cm from the mirror. Sketch the ray diagram to show the location of the image. How tall is the image?.
   • An object that is 24 mm tall is placed 12 ...  

A lens forms a real image 3 cm high of an object 1 cm high.If the separation of object and image is 15 cm. Find the focal length of the lens.
   • A lens forms real image 3 cm high of an ob...  

A lens of focal length 20 cm is used to produce a ten times magnified image of a film slide on a screen. How far must the slide be placed from the lens / Light Reflection and Refraction Class 10
   • A lens of focal length 20 cm is used to pr...