Is plane mirror have focus?
Answer. A plane mirror can be considered as a spherical mirror of infinite radius. Also its focal length (half of radius) is infinity and the focus is located at infinity.
Is the focal length of a plane mirror infinite?
The focal length of a plane mirror is infinity as the image can be formed at an infinite distance inside the mirror. A plane mirror can be recognised as a spherical mirror of infinite radius of curvature. Focal length is half of the radius of curvature and hence it is infinity.
What is the radius of curvature of the mirror its focal length is 20 cm?
The radius of curvature of a spherical mirror is 20 cm. What is its focal length? Therefore, the focal length of the spherical mirror is 10 cm.
What is focal length of spherical mirror?
Focal length of the spherical mirror is the distance from the pole of the mirror to the focus point of the object. The radius of the curvature of the mirror is determined by the two formulas, one is magnification formula and other is focal length formula.
What is the relation between the radius of curvature and focal length of a mirror?
The relation between focal length (f) and radius of curvature (R) of a spherical mirror is that the focal length is equal to half of the radius of curvature i.e. f=R2.
What is the focal length of a mirror whose radius of curvature is 25 cm?
Answer: As per the question, the focal length of the convex mirror is 25 cm. Hence, focal length f = 25 cm.
What is the relation between focal length and refractive index?
Since from lens makers formula we can observe that focal length of lens is inversely proportional to refractive index of medium of lens . Hence net refractive index of lens decreases when it is dipped in a denser medium than air, hence focal length increases.
Is Focal length inversely proportional to refractive index?
From this formula we can say that focal length of lens is inversely proportional to refractive index of material of lens medium. i.e As Refractive index (m) increases focal length (f) of lens decreases.
Does focal length depend on color?
Yes, the focal length of a lens depends on the colour of light. Here, f is the focal length, μ is the refractive index, R is the radius of curvature of lens. The refractive index (μ) depends on the inverse of square of wavelength. The focal length of a mirror is independent of the colour of light.
Does the color of the light affect your focal length?
The focal length of a simple lens depends on the color (wavelength) of light passing through it….
Which light has maximum focal length?
The focal length plays an important role in the manufacturing of the lens. The main use of focal length is that it allows us to magnify an object or to make an object appear large, within the frame. Hence, focal length of convex lens is maximum for red light.
Which Colour has least focal length?
violet
For which Colour focal length of a lens is minimum?
violet wavelength
What color of light travels the fastest?
red