- What is a convex mirror?
Answer: A convex mirror is defined as a spherical mirror that features an outwardly bulged reflecting surface.
- What is a convex lens?
Answer: A convex lens is a type of lens that is thicker at the centre and thinner at the edges. It converges on a straight beam of light.
- What is the formula for finding the focal length of the convex lens?
Answer: The formula to find the focal length of the convex lens is 1/f=1/u+1/v.
- Explain the type of image formed by the convex mirror.
Answer: A convex mirror always creates only virtual images that are erect and diminished for all object positions.
- What kind of image is created by the convex lens?
Answer: The convex lenses form real as well as inverted images of different sizes. Erect, virtual, and enlarged images are formed based on the object’s position.
- Is the focal length of a convex lens positive or negative?
Answer: A convex lens has a positive focal length.
- What is a convex lens referred to as?
Answer: A convex lens is also referred to as a converging lens.
- Which type of lens has a negative focal length?
Answer: The concave lens is the lens which has a negative focal length.
- Define the power of the lens.
Answer: The power of a lens is defined as the reciprocal of the focal length.
- How is the lens power measured?
Answer: Lens power is measured in dioptres (D).
- A convex lens is used to treat which type of refractive error in the human eye?
Answer: The convex lens is used to treat hypermetropia or long-sightedness.
- Why is a convex lens used in cameras?
Answer: A convex lens is used in cameras because it focuses light in order to create a clear and sharp image.
- What are the types of mirrors?
Answer: Types of mirrors are,
- Plane mirrors
- Spherical mirrors
- Define focal length.
Answer: Focal length is the distance between the optical centre and the principal focus of the lens.
- Is a convex mirror a transparent or opaque object?
Answer: A convex mirror is an opaque object.
- What happens to the incident ray, which is an incident on a convex lens?
Answer: A convex lens converges the incident rays towards the principal axis.
- Which lens is known as a diverging lens?
Answer: A concave lens is known as a diverging lens.
- When a concave lens is combined with a convex lens, what would be the quality of the image?
Answer: A sharper image is formed when a concave lens is combined with a convex lens.
- The lens works on which principle?
Answer: The lens works on the principles of refraction.
- Which type of lens is used in the human eye?
Answer: Convex lenses are the lenses used in the human eye.
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