Concave Mirror Focal Length Quiz

What is the primary aim of the experiment discussed in the video?

• To calculate the speed of light

• To determine the refractive index of a lens

• To find the focal length of a concave mirror

• To measure the diameter of a concave mirror

Which of the following materials is NOT required for the initial setup of the experiment?

• Screen

• Meter scale

• Concave mirror

• Illuminated wire gauze

In the UV method, what is the first step after setting the distance between the object and the mirror?

• Measure the distance between the screen and the mirror

• Adjust the mirror to get a clear image

• Record the values of u and v

• Place the screen in front of the mirror

What is the measured distance between the mirror and the screen when the object distance is set to 24 cm?

• 30 cm

• 35.45 cm

• 40 cm

• 32.3 cm

How is the focal length calculated from the UV method?

• By using the formula 1/f = 1/u + 1/v

• By measuring the diameter of the mirror

• By using the formula f = u + v

• By measuring the distance between the object and the mirror

What is plotted along the abscissa in the u-v graph?

• 1/U

• 1/V

• U

• V

What is the focal length obtained from the u-v graph?

• 14.999 cm

• 15 cm

• 16 cm

• 14.81 cm

Which graph provides a focal length of 14.81 cm?

• 1/U - 1/V graph

• U-V graph

• Mirror graph

• Distance graph

What is the focal length obtained from the UV method in meters?

• 0.15 m

• 0.14999 m

• 0.1481 m

• 0.16 m

Which method provided the closest focal length to 15 cm?

• 1/U - 1/V graph

• Graphical method

• All methods

• UV method