An object is located in air, 25 cm from the vertex of the concave surface of a block of glass (as viewed from the air side of the surface). The surface’s radius of curvature is 11 cm. Use these indices of refraction: nair = 1.0 and nglass = 1.5. show answer Incorrect Answer 50% Part (a) Find the refraction image distance, in centimeters. Include its sign.

Your question is missing one part as "magnification"

i have completed the missing part below

a.

b.

Explanation:

For this type of numerical we will use the following formulas

......... Eq1

where,

refractive index of the medium surrounding refracting surface/object

i.e. =  

refractive index of the refracting surface/object

i.e.

distance of object from the vertex of the refracting surface

distance of image from the vertex of the refracting surface

radius of curvature of the refracting surface

........... Eq2

where,

magnification

Convention:

Given:

=

because refraction surface is concave

Required:

a.

b.

Solution:

a. putting values in eq1, we get

cm

b.

are their multiple choices ?

explanation: