An optical instrument which is used measure the properties of visible light is called?

Related Mcqs:

1. When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is _________?

   A. Visible
   B. Transparent
   C. Invisible
   D. opaque
   E. None of these

2. The instrument which i specially design for recording earth quake wave is called seismograph which measure earth quake waves on a ____________?

   A. Diatonic scale
   B. Fahrenheit Scale
   C. Richter scale
   D. Celsius Scale
   E. None of these

3. The instrument used to measure wind speed is?

   A. Anemometer
   B. Barometer
   C. Hydrometer
   D. Hygrometer

4. Instrument that measure the electric force ________?

   A. Hygrometer
   B. Hydrometer
   C. Ammeter
   D. Voltmeter

   Submitted by: Rashid Mehmood

5. Which instrument is used to measure the power of electric circuit ?

   A. Wavemeter
   B. Viscometer
   C. Wattmeter
   D. None of these

   Submitted by: Rashid Mehmood

6. The distance between the optical centre of a convex lens and its principal focus is called its_______?

   A. Focal Length
   B. Radius of Curvature
   C. Power
   D. Magnification

   Submitted by: Rashid Mehmood

7. The part of ear that is visible is called _______?

   A. External Ear
   B. Pinna
   C. Internal ear
   D. both A & B

   Submitted by: Muhammad Asif Khajjak

8. In what year did Galileo first use an optical telescope to study the moon?

   A. 1492
   B. 1609
   C. 1212
   D. 1743

   Submitted by: Malik Asghar Hussain

9. Hailey’s comet is visible after every_________?

   A. 84 years
   B. 76 years
   C. 1000 years
   D. 365 years

   Submitted by: Jameel Ahmed Solangi

10. What is the wavelength of visible spectrum:

    A. 1300-3000A
    B. 3900-7600A
    C. 7800-8000A
    D. None of these

    Submitted by: Fahad Mehsud