AIPMT 2002 | Geometrical Optics Question 72 | Physics

A bulb is located on a wall. Its image is to be obtained on a parallel wall with the help of convex lens. The lens is placed at a distance d ahead of second wall, then required focal length will be

only $${d \over 4}$$

only $${d \over 2}$$

more than $${d \over 4}$$ but less than $${d \over 2}$$

less than $${d \over 4}$$

AIPMT 2001

MCQ (Single Correct Answer)

-1

Optical fibre are based on

total internal reflection

less scattering

refraction

less absorption coefficient.

AIPMT 2001

MCQ (Single Correct Answer)

-1

A disc is placed on a surface of pond which has refractive index 5/3. A source of light is placed 4 m below the surface of liquid. The minimum radius of disc needed so that light is not coming out is,

$$\infty $$

3 m

6 m

4 m

AIPMT 2000

MCQ (Single Correct Answer)

-1

A tall man of height 6 feet, want to see his full image. Then required minimum length of the mirror will be

12 feet

3 feet

6 feet

any length

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