List of top Physics Questions on Light

Why does a clear sky appear blue?
The radius of curvature of a spherical mirror is \(20\text{ cm}\). What is its focal length?
An object of size \(4.0\text{ cm}\) is placed \(25.0\text{ cm}\) in front of a concave mirror of focal length \(15.0\text{ cm}\). At what distance from the mirror should a screen be placed to obtain a sharp image? Determine the nature and size of the image.
What types of images are formed by a convex lens?
A doctor prescribed a corrective lens of power \(+1.5\text{ D}\). Determine the focal length of the lens. Is the prescribed lens diverging or converging?
What is meant by "refractive index of water is \(1.33\)"?
Which type of mirror is used in the rearview mirror of vehicles and why?
A student sitting in the back row has difficulty seeing the blackboard. What kind of defect might the student's eye have? How can it be corrected?
A person's near point is \(50\text{ cm}\). His far point is \(2\text{ m}\). What is the name of the defect of vision he is suffering from?
Suggest the use of suitable lenses for the correction of each defect mentioned in the previous question.
What is meant by accommodation of the eye?
The refractive index of glass is \(1.5\) and that of water is \(1.33\). In which medium will light bend more? Explain with reason.
To get a real image of the same size as the object, where should the object be placed in front of a convex lens?
The action of which of the following changes the focal length of the eye lens?
Which type of mirror is used by dentists to examine teeth?
A convex lens of focal length \( f = 15\,cm \) forms a real image of a 6 cm tall object placed at 30 cm. Find the position, nature, and height of the image.
If two converging lenses of equal focal length \(f\) are kept in contact, then the focal length of the combination will be
Power of a convex lens is 2 dioptre. Its focal length will be
Which of the following is used to reduce chromatic aberration in lenses?
The formula of kinetic mass of photon is
In polarised light the angle between plane of vibration and plane of polarization is
In the phenomenon of photoelectric emission, on increasing the intensity of incident light, the photoelectric current
The wavelength of de Broglie wave associated with any moving particle does not depend on
Two light waves of equal amplitude and equal wavelengths are superimposed. The amplitude of the resultant wave will be maximum when phase difference between them is
Two narrow parallel slits illuminated by a coherent monochromatic light produces an interference pattern on a screen placed at a distance $ D $ from the slits. The separation between the dark lines of the interference pattern can be increased by