Question

can someone answer these questions fast plz.... IRRELEVANT ANSWERS WILL BE REPORTED.... if you can pls do it in a paper ​

Answer 1

Answer:

Explanation:

a) Given parameters :

Speed of light in vacuum (c) = 3 × 108 ms-1

Refractive index of glass (ng) = 1.50

Find out

The speed of light in the glass

Formula

Refractive index of a medium  = Speed of light in vacuum/Speed of light in the medium

Refractive index of glass = Speed of light in vacuum/Speed of light in the glass

Speed of light in the glass (v) = Speed of light in vacuum/ Refractive index of glass

v = c/ng

v = (3 × 108)/1.50

v = 2 × 108 ms-1

Answer

The speed of light in glass = v = 2 × 108 ms-1

b) A convex lens forms a virtual and erect image when the object is placed between the optical centre O and focus F′. Consider two rays starting from the top of the object. The ray AP going parallel to the principal axis after refraction passes through the focus F. The ray AO passing through the optical centre passes through the lens undeviated. These refracted rays produced backwards as shown by dotted lines. They meet at A′. Draw perpendicular A′B′ on the principal axis. Thus A′B′ is the complete image of object AB.