Hi Bhavya,

You haven't mentioned what post or designation do you want to join the Indian Airforce , so I've listed the physical requirements for Ground Duty & Flying Branch :-

• For Flying Branch :-
• Minimum height - 162.5 cm
• Leg length - Minimum - 99 cm, Maximum - 120 cm
• Thigh length - Maximum - 64 cm
• Sitting height - Minimum - 81.5 cm, Maximum - 96 cm
• Proportionate to age & height

• For Ground Duty :-
• The physical requirement for ground duty branch, you must have height more than 152 cm.
• There are relaxations for various categories.

• YOU CAN JOIN IAF THROUGH
  
• AFCAT ENTRY
  
• UNIVERSITY ENTRY SCHEME
  
• AFMC
  

Note - But you have to complete atleast your graduation to be able to join IAF!!!

I hope this helps!!!