Angular Magnification

Q.

Question 2
A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his textbook. Which of the following statements is correct?

(a) The near point of his eyes has receded away
(b) The near point of his eyes has come closer to him
(c) The far point of his eyes has come closer to him
(d) The far point of his eyes has receded away

Q.

For which of the following colour, the magnifying power of a microscope will be maximum

1. White colour

2. Red colour

3. Violet colour

4. Yellow colour

Q. Under what condition does a biconvex lens of glass having a certain refractive index act as a plane glass sheet when immersed in liquid?

Q.

Question 2
A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his textbook. Which of the following statements is correct?

(a) The near point of his eyes has receded away
(b) The near point of his eyes has come closer to him
(c) The far point of his eyes has come closer to him
(d) The far point of his eyes has receded away

Q.

Where should the pen be placed for it to look the biggest? (and not be blurred)

1. Between near point and eye

2. None of these

3. At near point

4. Beyond near point

Q. Two identical thin plane-convex lenses of refractive index n are silvdered one on the plane side and the other on the convex side.The ratio of their focal legths is

1. (n-1) / n
2. n / (n-1)
3. n
4. (n+1) / n

Q. Find the synonym of the underlined word.
George Ravencroft's invention of lead crystal in the late $17$th century was crucial to the development of optical lenses.

1. Essential to
2. Instructive for
3. Prior to
4. Dependent on
5. Propitious for

Q.

Where should the pen be placed for it to look the biggest? (and not be blurred)

1. Anywhere

2. Beyond near point

3. At near point

4. Between near point and eye