Refractive Index of a Glass Slab Using a Traveling Microscope

What is the primary aim of the experiment involving the glass slab and traveling microscope?

• To measure the thickness of the glass slab

• To calibrate the traveling microscope

• To observe the effects of lycopodium powder

• To determine the refractive index of the glass slab

Which of the following is NOT a part of the traveling microscope?

• Spirit level

• Horizontal vernier scale

• Objective

• Eyepiece

How is the least count of the microscope calculated?

• By multiplying the number of main scale divisions by the vernier scale divisions

• By subtracting the vernier scale reading from the main scale reading

• By dividing the length of one main scale division by the number of divisions on the vernier scale

• By adding the main scale and vernier scale readings

What is the purpose of using a spirit level in the experiment?

• To mark the point P on the paper

• To focus the microscope

• To ensure the microscope is horizontally aligned

• To measure the thickness of the glass slab

What should be done after placing the glass slab over the mark on the paper?

• Change the eyepiece of the microscope

• Apply more lycopodium powder

• Loosen the screw for vertical adjustment and raise the lens system

• Adjust the horizontal position of the microscope

Why is lycopodium powder used in the experiment?

• To measure the refractive index

• To adjust the microscope's focus

• To clean the glass slab

• To make the top surface of the glass slab visible

How is the real thickness of the glass slab determined?

• By adding R1 and R2

• By subtracting R2 from R3

• By dividing R3 by R1

• By subtracting R1 from R3

What is the formula for calculating the refractive index of the glass slab?

• Real thickness divided by apparent thickness

• Difference between real and apparent thickness

• Sum of real and apparent thickness

• Apparent thickness divided by real thickness

How many times should the experiment be repeated to find the mean refractive index?

• Three times

• Four times

• Twice

• Once

What was the refractive index of the glass slab found to be in the experiment?

• 1.50333

• 1.533

• 1.503

• 1.5033