Light

Light

Easy Questions
Moderate Questions

Physics

Mechanics
Heat
Sound
Light
Electricity and Magnetism
Modern Physics
Electronic devices & Communication system
Physics miscellaneous
  1. The apparatus used to measure the intensity of light is known as








  1. View Hint View Answer Discuss in Forum

    The apparatus used to measure the intensity of light is known as Lux meter.

    Correct Option: C

    The apparatus used to measure the intensity of light is known as Lux meter.

  1. White light is made up of seven colours. What is the method of separating the colours ?








  1. View Hint View Answer Discuss in Forum

    When a white ray of light passes through a prism it breaks into 7 colours VIBGYOR.

    Correct Option: A

    When a white ray of light passes through a prism it breaks into 7 colours VIBGYOR.

  1. A myopic eye can be corrected by using a








  1. View Hint View Answer Discuss in Forum

    A myopic eye can be corrected by using a concave lens .

    Correct Option: B

    A myopic eye can be corrected by using a concave lens .

  1. Red light is used as danger signal because it








  1. View Hint View Answer Discuss in Forum

    Red light is used as danger signal because it is scattered least.
    Scattering ∝ 1/λ4
    And among three primary colours red, green and blue red has maximum wavelength.

    Correct Option: A

    Red light is used as danger signal because it is scattered least.
    Scattering ∝ 1/λ4
    And among three primary colours red, green and blue red has maximum wavelength.

  1. The least distance of distinct vision for human eye is








  1. View Hint View Answer Discuss in Forum

    The least distance of distinct vision is of 25 cm . It is the minimum distance that eye can accommodate to see the object.

    Correct Option: A

    The least distance of distinct vision is of 25 cm . It is the minimum distance that eye can accommodate to see the object.