On what factors focal length of a concave mirror depends?
Answer Expert Verified Focal length mainly depends on one factor: Radius of curvature R of the spherical mirror. If the mirror is in air or in another medium, then focal length = R/2. Focal length is independent of the medium, material of the mirror, frequency of the light rays, temperature etc.
What is the focal length of the concave mirror?
Focal Length – The distance between the pole P of the concave mirror and the focus F is the focal length of the concave mirror. Thus, the focal length of a concave mirror can be estimated by obtaining a ‘Real image’ of a distant object at its focus, as shown in the figure.
What does the focal length of a mirror depend on?
Focal length of a spherical mirror depends on radius of curvature of the mirror.
What is the focal length of a concave mirror Class 7?
10 cm is the focal length of the concave mirror.
What factor does the focal length?
So, focal length depends on the radius of curvature, the refractive index of lens material, and the medium’s refractive index in which the lens is placed.
What is the focal length if power is?
The power of a lens is defined as the reciprocal of the focal length. Lens power is measured in dioptres (D). Converging (convex ) lenses have positive focal lengths, so they also have positive power values. Diverging (concave ) lenses have negative focal lengths, so they also have negative power values.
What is focal length short answer?
Focal length of a lens is the distance between centre of lens and focal point . Focal point is a point on principal axis , at which light rays parallel to principal axis meet after refraction through lens or seem to meet after refraction .
What is focus of concave mirror?
Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror. This point is known as the principal focus of the concave mirror.
On what factors focal length depend?
What is the focus of concave mirror?
Hint : The principal focus of a concave mirror is the point where a ray of light parallel to the principal axis will converge to the focal point. The focal length is the distance between the pole of the mirror and the focal point of the mirror.
What is focal length class 10 CBSE?
Focal length: The focal length (denoted by FP in the fig.) is the distance between the pole P and the principal focus F of a curved mirror. The focal length is half the radius of curvature. Focal length = Radius of curvature/2 .
What is focal length Brainly?
Focal length is the distance between the center of a convex lens or a concave mirror and the focal point of the lens or mirror — the point where parallel rays of light meet, or converge.
