Question 2 :
Least distance of distinct vision for young adult with normal eye is almost:

Question 5 :
A normal eye is not able to see objects closer&#160;than 25 cm because :<br/>

Question 7 :
The human eye part which can be used again and again for forming different images is called

Question 10 :
The dark muscular diaphragm in the human eye that controls the pupil is:

Question 11 :
Assertion: A ray of white light shows no dispersion on emerging from a glass slab although dispersion occurs inside the glass slab. Reason: The velocity of light inside the glass slab is same for all different colours.

Question 12 :
Assertion : If a plane glass slab is placed on the letters of different colours all the letters appears to be raised up to the same height.<br>Reason : Different colours have different wavelengths.

Question 13 :
A piece of cloth looks red in sun light. If it is held in the blue portion of a solar spectrum, it will appear

Question 14 :
When white light splits in seven colours, the phenomenon is called spectrum.

Question 15 :
Due to which property of colours they appear differently though the sunlight is passed through only one medium?<br>

Question 16 :
In a YDSE with two identical slits, when the upper slit is covered with a thin, perfectly transparent sheet of mica, the intensity at the centre of screen reduces to $75\%$ of the initial value. Second minima is observed to be above this point and third maxima below it. Which of the following can be a possible value of phase difference caused by the mica sheet.

Question 17 :
The angle between the incident ray and the normal is called ________.<br>

Question 19 :
A narrow of white light goes through a slab having parallel faces.

Question 20 :
With an object between those, if the angle &#160;between two plane mirrors is acute, the number of images formed will be: