Popular Questions
- A concave lens of focal length 15cm forms an image 10cm from the lens
- An object is placed at a distance of 10m from a convex mirror
- The magnification produced by a plane mirror is +1. What does it mean?
- An object 5cm in length is placed at a distance of 20cm in front of convex mirror
- An object of size 7cm is placed at 27cm in front of a concave mirror
- Find the focal length of a lens of power
- A doctor has prscribed corrective lens of power +1.5 D.
- Define principal focus of a concave mirror
- Name a mirror that can give an erect and enlarged image of an object.
- The radius of curvature of spherical mirror is 20cm. What is its focal length?
- Why do we prefer a convex mirror as rear view mirror in vehicles?
- Find the focal length of a convex mirror whose radius of curvature is 32cm.
- A concave mirror produces three times magnified (enlarged) real image of
- A ray of light travelling in air enters obliquely into water.
- Light enters from air to glass having refractive index 1.50.
- Find out from table given below, the medium having highest optical density.
- You are given kerosene, turpentine and water.
- The refractive index of diamond is 2.42.
- Define 1 D of power of lens.
- A convex lens forms a real and inverted image of a needle at a distance of 50cm from it
- find the power of concave lens of focal length 2m.
- Focal length of a plane mirror is
- An object is placed at a distance of 10cm in front of a plane mirror, then the distance of image from mirror will be
- The image of an object placed in front of a convex mirror is formed at
- The radius of curvature of concave mirror is 12cm. Then, the focal length will be
- An object is placed 20cm from the concave mirror of focal length 10cm, then image is formed at
- Velocity of light in air is 3*10power8 m/s. While its velocity in a medium is
- A 10 mm long awl pin is placed vertically in front of a concave mirror
- Figure shows a ray of light as it travels from medium A to medium B.
- A light ray enters from medium A to medium B as shown in the figure.
- Beams of light are incident through the holes A and B and emerge out of box through the holes c and d respectively as shown in the..
- The path of a ray of light coming from air passing through a rectangular glass slab traced by four students shown as A, B, C and d..
- You are given water, mustard oil, glycerine and kerosene.
- An object of height 8 cm is placed at a distance of 40cm infront of a convex lens of focal length 20cm. The size of image is
- Two thin lenses of power 3D and -2D are placed in contact,
- Assertion : Large concave mirrors are used to concentrate sunlight Reason : Concave mirror converges the light rays falling on it ..
- Assertion : A ray incident along normal to the mirror Reason : In reflection, angle of incidence is always equal to angle of refle..
- Assertion : When a concave mirror is held under water, Reason : The focal length of a concave mirror is independent
- Assertion : Higher is the refractive index of a medium or denser the medium Reason : Refractive index is inversely proportional to..
- Due to which property of light, sharp shadows of opaque objects are obtained?
