Self Studies
Self Studies
Self Studies
Self Studies

Ray Optics and Optical Test - 39

Result Self Studies

Ray Optics and Optical Test - 39
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    Laws of refraction to hold good:
    Solution
    Refraction takes place when light passes from one medium to another. These two media should have different optical densities for the laws of refraction to hold good.

  • Question 2
    1 / -0
    Due to refraction,
    Solution
    Due to refraction from glass, light coming out gives a sparkling effect in a glass sphere.
    Due to reflection, the image in the plane mirror is clear, and polished black surfaces shine.
    The speed of light is different for different mediums.
  • Question 3
    1 / -0
    A virtual image occurs when light rays appear to converge. One example of the formation of a virtual image is 
    Solution
    When an object is placed in between the pole and the focus of a concave mirror, the reflected rays appear to converge at a point behind the mirror. So, a virtual image is formed.

  • Question 4
    1 / -0
    The refractive index of a medium is ______  to the speed of light in the medium.
    Solution

    Correct answers is (b).

    As per law of refraction the speed with which light propagates through a dielectric medium is inversely proportional to the refractive index of the medium.

  • Question 5
    1 / -0
    When an object is placed under a transparent medium, it appears to be raised. The upward shift = 
    Solution
    $$Shift =  Real  depth - Apparent  depth$$
    So, $$Shift= Real  depth \times (1-\frac{1}{_a\mu_m})$$
  • Question 6
    1 / -0
    The refractive index of a medium:
  • Question 7
    1 / -0
    Given a trace of light, refractive index of the medium can be found by using:
    Solution
    According to Snell's Law,
    $$\mu = \dfrac{sin\ i}{sin\ r}$$
    where 
    $$\mu: \text{Refractive index of the medium 2 w.r.t. medium 1}$$
    $$i: \text{Angle of incidence}$$
    $$r: \text{Angle of refraction}$$

    If trace of light is known, then $$i$$ and $$r$$ are known and hence $$\mu$$ can be found.
  • Question 8
    1 / -0
    Second law of refraction is also called:
    Solution
    Second Law of refraction is also called the Snell's Law. According to it,
    $$\mu =\dfrac{sin\ i}{sin\ r} = constant$$
  • Question 9
    1 / -0
    Refraction of light can take place at boundary of
    Solution

    Correct answer (c)

    Refraction of light can take place at boundary of any medium. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media. Snell's law can be derived from Fermat's Principle or from the Fresnel Equations

  • Question 10
    1 / -0
    Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
    Solution
    $$\textbf{Explanation:}$$ 
    $$\bullet$$A basic microscope can also be made with a convex lens. 
    $$\bullet$$A virtual, erect, and magnified image is generated by keeping the object between the focal length and the mirror. 
    $$\bullet$$A shorter focal length provides greater power and allows for higher magnification. 
    $$\bullet$$As a result, a convex lens with a focal length of 5 cm is preferred.
    $$\textbf{Step C is correct.}$$ 
Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now