30 Questions
What is the name of the line passing through the pole and the centre of curvature of a spherical mirror?
Principal axis
What is the relationship between the principal axis and the mirror's surface?
The principal axis is perpendicular to the mirror's surface.
Why should you not look directly at the Sun or into a mirror reflecting sunlight?
It can damage your eyes.
What happens when you hold a concave mirror towards the Sun and focus the reflected light onto a sheet of paper?
The paper will begin to burn and produce smoke.
What is the point where the reflected light from the Sun is focused by the concave mirror called?
Focal point
How can you determine the approximate focal length of the concave mirror using the experiment?
By measuring the distance between the mirror and the paper where the bright spot appears.
What is the magnification produced by a spherical mirror?
The ratio of the height of the image to the height of the object
What happens when a light ray travels obliquely from a denser medium to a rarer medium?
The light ray bends away from the normal
What is the speed of light in vacuum?
$3 \times 10^8$ m/s
What is the refractive index of a transparent medium?
The ratio of the speed of light in vacuum to that in the medium
What happens to the emergent ray when light passes through a rectangular glass slab?
The emergent ray is parallel to the direction of the incident ray
Which of the following is the lens formula?
$\frac{1}{u} + \frac{1}{v} = \frac{1}{f}$
What will happen if one-half of a convex lens is covered with a black paper?
The lens will produce a partial image of the object
An object 5 cm in length is held 25 cm away from a converging lens of focal length 10 cm. What is the position, size, and nature of the image formed?
The image is formed at 15 cm, is 2.5 cm in size, and is real and inverted
A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens?
20 cm
What does a magnification of +1 produced by a plane mirror mean?
The image is the same size as the object
A doctor has prescribed a corrective lens of power +1.5 D. What type of lens is this?
Converging lens
What is the focal length of a lens with a power of -2.0 D?
-1.0 m
What causes a pencil to appear displaced when partially immersed in water?
The light from the pencil inside water seems to come from a different direction.
If a glass slab is placed over letters, what happens to their appearance?
The letters appear to be raised.
Does the extent of the apparent displacement depend on the medium?
Yes, it depends on the pair of media involved.
What is the phenomenon responsible for the change in the direction of light when it travels obliquely from one medium to another?
Refraction
In the activity with the coin at the bottom of a water-filled bucket, why was it difficult to pick up the coin in one go?
The coin appeared to be at a different depth due to refraction.
What is the purpose of comparing experiences with friends in the coin activity?
To verify that the effect is consistent across different observers.
What is the main topic discussed in the given text?
Reflection and refraction of light
Which of the following statements about the nature of light is true?
Light is neither a wave nor a particle
What is the first law of reflection mentioned in the text?
The angle of incidence is equal to the angle of reflection
Which of the following statements about the laws of reflection is correct?
The laws of reflection apply to all reflecting surfaces, including spherical surfaces
What does the text imply about the formation of an image by a plane mirror?
The properties of the image formed by a plane mirror are well-known
Based on the text, what can be inferred about the scope of the chapter?
The chapter covers both reflection and refraction of light
Learn about the emergence of the modern quantum theory of light that reconciles its particle properties with wave nature in the early 20th century. Explore how this theory revolutionized the understanding of light-matter interaction.
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