Home
Class 12
PHYSICS
An object is placed in front of a concav...

An object is placed in front of a concave mirror of radius of curvature 40 cm at a distance of 10 cm.Find the position and magnification of the image.

Text Solution

Verified by Experts

`R=-40 cm`
`rArr f=R/2 =-40/2 = -20 cm`
`u=-10 cm`
Using mirror formula,
`1/u + 1/v =1/f`
`-1/10 + 1/v = -1/20`
`1/v = -1/20 +1/10 =(-1+2)/20 = 1/20`
`rArr v=+20 cm`
Image is formed at distance of 20 cm behind the concave mirror.
Image formed is virtual, erect and twice the size of the object.
Magnification `=m =-v/u`
`m=(-20)/(-10) =2`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • REFLECTION OF LIGHT

    BETTER CHOICE PUBLICATION|Exercise MOST EXPECTED QUESTIONS (2 Marks)|4 Videos

  • RADIOACTIVITY

    BETTER CHOICE PUBLICATION|Exercise MOST EXPECTED QUESTIONS |6 Videos

  • REFRACTION OF LIGHT

    BETTER CHOICE PUBLICATION|Exercise NUMERICAL PROBLEMS|36 Videos

Similar Questions

Explore conceptually related problems

An object is placed in front of a concave mirror of radius of curvature 30 cm at a distance of10 cm.Find the position,nature and magnification fo the image.

An object is placed in front of concave mirror of radius of curvature 40 cm at a distance of 10cm. Find the position, nature and magnification.

An object is placed in front of a concave mirror of radius of curvature 40 cm at a distance of 10 cm. Find the position and nature of image formed.

An object is placed 15 cm in front of a concave mirror of radius of curvature 20 cm. Calculate position, nature and magnification of image.

An object of height 5 cm is placed 2 m in front of concave mirror of radius of curvature 40 cm. Find the size of the image

An object of height 5cm is placed 200cm in front of concave mirror of radius of curvature 40 cm. Find the size of the image.

An object is placed 15 cm from a convex mirror of radius of curvature 90 cm.Calculate the image position and magnification.

An object 5.0 cm of length is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position of the image,its nature and size.

An object is placed 21 cm in front of a concave mirror of radius of curvature 10 cm.A glass slab of thickness 3 cm and refractive index 1.5 is then placed close to the irror in the space between the object and mirror as shown in Fig.2.62.Find the position of the final image formed.You may take the distacne of the near surface of the slab from the mirror to be 1 cm. .

Find the focal-length of a convex mirror whose radius of curvature is 32 cm.

Home
Profile