SI unit of light is _________ ?

Related Mcqs:

1. A light year is a unit of ?

   A. Time
   B. Energy
   C. distance
   D. Mass

2. The unit of torque in International system of unit is _________?

   A. Newton
   B. Newton-Meter
   C. Kilogram
   D. Meter

   Submitted by: Rashid Mehmood

3. Atmospheric pressure is the force (per unit-area) perpendicular to a unit-area of planetary surface, as determined by _________.

   A. Mass of vertical column of atmospheric gases
   B. Mass of horizontal column of atmospheric gases
   C. Weight of vertical column of atmospheric gases
   D. Mass of vertical and weight of horizontal of atmospheric gases

   Submitted by: Muhammad Abdullah

4. 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

5. What are the primary colors of Light?

   A. White, Black, Blue
   B. Red, Yellow, Blue
   C. Red, Orange, Blue
   D. Red, Green, Blue

6. When a person enters a dark room from bright light he is not able to see clearly for a little while because the?

   A. Eye is unable to adjust itself immediately
   B. Retina becomes insensitive momentarily
   C. Iris is unable to dilate the pupil immediately
   D. Distance between the lens and retina take time to adjust

7. The speed of light with the rise in the temperature of the medium____________?

   A. Decrease
   B. Increase
   C. Remain the same
   D. First decrease then increase

   Submitted by: WIQAR AHMAD

8. If the green leaves are placed under red light, their color will become________?

   A. Green
   B. Black
   C. Red
   D. Blue

   Submitted by: Syed Rameez ul Hassan

9. Which of the following is mainly used for light patrol engines ?

   A. Kerosene oil
   B. Paraffin oil
   C. Heavy Fuel oil
   D. Gasoline

   Submitted by: Faheem Zaman Dhaunroo

10. Recently, scientists observed the merger of giant ‘blackholes’ billions of light-years away from the Earth. What is the significance of this observation?

    A. ‘Higgs boson particles’ were detected.
    B. Gravitational waves’ were detected.
    C. Possibility of inter-galactic space travel through ‘wormhole’ was confirmed.
    D. It enabled the scientists to understand ‘singularity’.

    Submitted by: Abid Hussain