|
Chapter 1: Electric Charges and Fields
|
Chapter 2: Electrostatic Potential and Capacitance
|
|
Chapter 3: Current Electricity
|
Chapter 4: Moving Charges and Magnetism
|
|
Chapter 5: Magnetism and Matter
|
Chapter 6: Electromagnetic Induction
|
|
Chapter 7: Alternating Current
|
Chapter 8: Electromagnetic Waves
|
|
Chapter 10: Wave Optics
|
Chapter 11: Dual Nature of Radiation and Matter
|
|
Chapter 12: Atoms
|
Chapter 13: Nuclei
|
|
Chapter 14: Semiconductor Electronics Materials
|
Chapter 15: Communication Systems
|
|
1.
|
For a concave mirror of focal length ‘f’, the minimum distance between the object and its real image is:
(a) zero (b) f (c) 2f (d) 4f
|
|
2.
|
A beam of light travels from air into a medium. Its speed and wavelength in the medium are 1.5 × 108𝑚𝑠−1 and 230 𝑛𝑚 respectively. The wavelength of light in air will be.
(a) 230 𝑛𝑚 (b) 345 𝑛𝑚 (c) 460 𝑛𝑚 (d) 690 𝑛𝑚
|
|
3.
|
A ray of light of wavelength 600 nm propagates from air into a medium. If its wavelength in the medium becomes 400 nm, the refractive index of the medium is
(a) 1.4 (b) 1.5 (c) 1.6 (d) 1.8
|
|
4.
|
A ray of light travels a distance of 12.0 m in a transparent sheet in 60 ns. The refractive index of the sheet is
(a) 1.33 (b) 1.50 (c) 1.65 (d) 1.75
|
|
5.
|
Which of the following pairs of media has the least value of critical angle?
(a) Glass to air (b) Glass to water (c) Diamond to water (d) Diamond to air
|
|
1.
|
An object is kept 20 cm in front of a concave mirror of radius of curvature 60 cm. Find the nature and position of the image formed.
(CBSE 2022, 2M)
|
|
2.
|
An object is kept in front of a concave mirror of focal length 15 cm. The image formed is real and three times the size of the object. Calculate the distance of the object from the mirror.
(CBSE 2019, 2M)
|
|
3.
|
A point source in air is kept 24 cm in front of a concave spherical glass surface (aµg = 1.5) and radius of curvature 60 cm. Find the nature of the image formed and its distance from the point source.
(CBSE 2022, 3M)
|
|
4.
|
Two objects P and Q when placed at different positions in front of a concave mirror of focal length 20 cm, form real images of equal size. Size of object P is three times size of object Q. If the distance of P is 50 cm from the mirror, find the distance of Q from the mirror.
(CBSE 2020, 3M)
|
|
5.
|
(a) Using the necessary ray diagram, derive the mirror formula for a concave mirror.
(b) In the magnified image of a measuring scale (with equidistant markings) lying along the principal axis of a concave mirror, the markings are not equidistant. Explain.
(CBSE 2020, 3M)
|
|
Chemistry
|
Biology
|
|
Mathematics
|
Physical Education
|
|
Chapter Name
|
Sub Topics of Chapter 9: Ray Optics and Optical Instruments
|
|
Ray Optics and Optical Instruments
|
9.1 Reflection of Light
|
|
9.2 Refraction of Light
|
|
|
9.3 Total Internal Reflection
|
|
|
9.4 Refraction Through a Prism
|
|
|
9.5 Dispersion of Light by a Prism
|
|
|
9.6 Optical Instruments
|
|
|
9.7 Microscope and Telescope
|
