University:
Cypress College
Course:
PHYS 201 C | College Physics I
Academic year:

2021
Views:

16

Pages:

44
Author:

NikkiP24

Chapter 9: Optics EXERCISES, EXERCISE [PAGES 1-185] Exercises | Q1. (0)| Page 184 Choose the correct option. As per the recent understanding, light consists of 1. rays 2. waves 3. corpuscles 4. photons obeying the rules of waves SOLUTION Photons obeying the rules of waves Exercises Q1. (ii)| Page 184 Choose the correct option. Consider the optically denser lenses P, Q, R. and S drawn below. According to the Cartesian sign convention which of these have a positive focal length? () () P 1. Only P 2. Only P and Q 3. Only P and R 4. Only Q and S SOLUTION Only P and Q Exercises | Q1. (i)| Page 184 Choose the correct option. Two plane mirrors are inclined at angle of 40" between them. Number of images seen of a tiny object kept between them is 1. Only 8 2. Only 9 3. Bor 9 4. 9 or 10 SOLUTION Two plane mirrors are inclined at angle of 40" between them. Number of images seen of a tiny object kept between them is 8 or 9 Exercises | Q1. (iv) | Page 184 Choose the correct option. A concave mirror of curvature 40 cm, used for shaving purposes produces image of double size as that of the object. Object distance must be 1. 10 cm only 2. 20 cm only 3. 30 cm only 4. 10 cm or 30 cm SOLUTION 10 cm or 30 cm Exercises | Q1. (v) | Page 184 Choose the correct option. Which of the following aberrations will NOT occur for spherical mirrors? 1. Chromatic aberration 2. Coma 3. Distortion 4. Spherical aberration SOLUTION Chromatic aberration Exercises | Q1. (vi) | Page 184 Choose the correct option. There are different fish, monkeys, and water of the habitable planet of the star Proxima b. A fish swimming underwater feels that there is a monkey at 2.5 m on the top of a tree. The same monkey feels that the fish is 1.6 m below the water surface. Interestingly. height of the tree and the depth at which the fish is swimming are exactly same. Refractive index of that water must be 6-5544-37-5 SOLUTION 5/4 Exercises | Q1. (vii) | Page 184 Choose the correct option. Consider the following phenomena/applications: P) Mirage. Q) rainbow, R) Optical fibre and S) glittering of a diamond. Total internal reflection is involved in 1. Only R and S 2. Only R 3. Only P. R and S 4. all the four SOLUTION Only R and S Exercises | Q1. (vii) | Page 184 Choose the correct option. A student uses spectacles of number-2 for seeing distant objects. Commonly used lenses for her/his spectacles are 1. bi-concave 2. double concave 3. concavo-convex 4. convexo-concave SOLUTION A student uses spectacles of number -2 for seeing distant objects. Commonly used lenses for her/his spectacles are bi-concave Exercises | Q1. (ix) | Page 185 Choose the correct option. A spherical marble, of refractive index 1.5 and curvature 1.5 cm. contains a tiny air bubble at its centre. Where will it appear when seen from outside? 1 cm inside at the centre 5 3cm inside 2 cm inside SOLUTION At the centre Exercises | Q1.00 | Page 185 Choose the correct option. Select the WRONG statement. 1. Smaller angle of prism is recommended for greater angular dispersion. 2. Right-angled isosceles glass prism is commonly used for total internal reflection. 3. Angle of deviation is practically constant for thin prisms. 4. For emergent rays to be possible from the second refracting surface, certain minimum angle of incidence is necessary from the first surface. SOLUTION Smaller angle of prism is recommended for greater angular dispersion. Exercises | Q1. (xi) | Page 185 Choose the correct option. Angles of deviation for extreme colours are given for different prisms. Select the one having maximum dispersive power of its material. 1. 7, 10 2. 8, 11 3. 12, 16 4. 10 , 14" SOLUTION 7", 10° Exercises | Q1. (xii) | Page 185 Choose the correct option. Which of the following is not involved in formation of a rainbow? 1. refraction 2. angular dispersion 3. angular deviation 4. total internal reflection SOLUTION Total internal reflection Exercises | Q1. (xiii) | Page 185 Choose the correct option. Consider the following statements regarding a simple microscope: (P) It allows us to keep the object within the least distance of distant vision. (Q) Image appears to be biggest if the object is at the focus. (R) It is simply a convex lens. 1. Only (P) is correct 2. Only (P) and (Q) are correct 3. Only (Q) and (R) are correct 4. Only (P) and (R) are correct SOLUTION Only (P) and (R) are correct Exercises | Q2. (1) | Page 185 Answer the following question. As per recent development, what is the nature of light? Wave optics and particle nature of light are used to explain which phenomena of light respectively? SOLUTION i . As per recent development, it is now an established fact that light possesses dual nature. Light consists of energy carrier photons. These photons follow the rules of electromagnetic waves. ii. Wave optics explains the phenomena of light such as interference, diffraction, polarization, Doppler effect, etc. iii. Particle nature of light can be used to explain phenomena like photoelectric effect, emission of spectral lines. Compton effect, etc.