List of top Physics Questions on Optical Properties asked in UP Board XII

Focal lengths of objective and eye lenses of a telescope are 40 cm and 4 cm respectively. For an object placed in front of objective lens by 200 cm, what will be the distance between two lenses for normal vision ? Also find its magnification.
Derive Lens Maker's formula for a thin lens.
What is total internal reflection?
A convex lens of focal length f is placed somewhere between object and screen. The distance between object and screen is x. If m be the magnification of lens, then prove that \(f = \frac{mx}{(m + 1)^2\).}
The sun makes an angle of 0.5\(^\circ\) on earth's surface. Its image is made with convex lens of focal length 50 cm. The diameter of image will be

In hydrogen atom, what is the ionization potential of the electron in the ground state? 
 

The focal lengths of a convergent and a divergent lens are \( f_1 \) and \( f_2 \) respectively. If the lenses are placed in contact, then in the following conditions of combination, write the nature of the combined lens and also draw the ray diagram: (i) \( f_1>f_2 \)
(ii) \( f_1<f_2 \)
(iii) \( f_1 = f_2 \)
(i) Condition: \( f_1>f_2 \)

Compare the Astronomical Telescope and Compound Microscope on the basis of the following: 

(i) Components
(ii)Magnifying power
Explain with reason whether any one of the above devices can be used as the other device.
(i) Components

In lens maker formula \( \frac{1}{f} = (n-1) \left( \frac{1}{R_1} - \frac{1}{R_2} \right) \), which focal length is used?

A double convex lens is made of a material having refractive index 1.2. Both the surfaces of the lens are convex. If it is dipped into water of refractive index 1.33, it will behave like: 
 

Find the ratio of the focal length of lens in air and that of lens when it is immersed in liquid. 
 

 The maximum focal length of convex lens is for: 
 

State Ampere's Circuital Law. 
 

Write the equation for the relationship between specific conductivity (\( \sigma \)) and drift velocity (\( v_d \)).