Light – Reflection and Refraction
What is the focal length of a convex mirror whose radius of curvature is $32\text{ cm}$?
Define reflection of light and state its basic laws.
What is meant by the principal focus of a concave mirror?
Why is a convex mirror preferred as a rear-view mirror in vehicles?
State the relationship between the radius of curvature and the focal length of a spherical mirror.
Define refraction of light. What is the fundamental cause of refraction?
State Snell's law of refraction of light.
What do you mean by the absolute refractive index of a medium?
Define the power of a lens and state its SI unit.
Why does a pencil immersed obliquely in water appear bent at the water surface?
What is the principal focus of a convex lens?
Define magnification produced by a spherical mirror.
What is the optical center of a spherical lens?
State the conditions under which a concave mirror forms a virtual and erect image.
Define lateral displacement of a light ray passing through a glass slab.
What type of lens is a diverging lens and why is it called so?
An object 4 cm in size is placed at 25 cm in front of a concave mirror of focal length 15 cm. At what distance from the mirror should a screen be placed in order to obtain a sharp image? Find the nature and the size of the image.
A convex lens has a focal length of 20 cm. At what distance from the lens should a candle be placed so that its real and inverted image is formed at a distance of 60 cm from the lens? Also, find the magnification.
Why is a convex mirror preferred as a rear-view mirror in vehicles? Explain with proper reasoning regarding its field of view and the nature of the image formed.
Define refraction of light. State the laws of refraction. Also, define the refractive index of a medium in terms of the speed of light and explain its significance with proper examples.
Draw a neat ray diagram to show the formation of a real and inverted image by a concave mirror when the object is placed between the focus and the center of curvature. Also, explain the characteristics of the image formed and state the mirror formula.
Define refraction of light. State the laws of refraction. Explain absolute refractive index and relative refractive index with necessary mathematical formulas. Also, explain why a pencil partially immersed in water appears bent at the interface.