How does the frequency of a beam of ultraviolet light change when it travels from air into glass?
(A) depends on the values of p and e
(B) increases
(C) decreases
(D) remains same
1 Answers
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A parallel beam of white light falls from air on a thin film whose refractive index is `sqrt ( 3)` . The medium on both sides of the film is air. The
Correct Answer - 100nm
2 Answers 1 views
A parallel beam of monochromatic light of frequency v is incident on a surface. Intensity of the beam is I and area of the surface is A. Find the forc
Correct Answer - (i) `(IA)/(c)` , (ii) `(2IA)/(c)` (iii) `(Iacostheta)/(c)` , (iv) `(2IAcos^(2)theta)/(c)`
2 Answers 1 views
Light travels a certain distance in water in `3 mu` s . How much time it would take for light for travel the same distance in air ? Refractive index o
Correct Answer - `2.2 mu` s
2 Answers 1 views
A beam of light travelling in water falls on a glass plate immersed in water. When the incident angle is `51^(@)`, the reflected beam of light is foun
Correct Answer - 1.647
2 Answers 1 views
A glass sphere with `10 cm` radius has a `5 cm` radius spherical hole at its centre. A narraow beam of parallel light is directed into the sphere. Whe
Correct Answer - 5 cm of the left of the surface of sphere
2 Answers 1 views
A glass plate (n=1.53) that is 0.485 ` mu` m thick and surrounded by air is illuminated by a beam of white light normal to the plate. (a) What wavelen
Correct Answer - `[(a) 424 nm, 594 nm; (b) 495 nm]
2 Answers 1 views
The refractive index of glass for light going from aif’to glass is 3/2. The refractive index of air for light going from glass to air ………………….
Correct option is C) 4/6
2 Answers 1 views
If i and r be the angles of incidence and refraction respectively, when the light ray travels from glass to air, then
Correct option is C) i < r
2 Answers 1 views
A glass slab is placed in the path of a beam of convergent light. The point of convergence of light
(A) moves towards the glass slab.
2 Answers 1 views
Calculate the ratio of the intensities of the two waves, if amplitude of first beam of light is 1.5 times the amplitude of second beam of light.
a1 = 1.5 a2 To find: \(\frac{I_1}{I-2}\) Formula: I ∝ a2 Calculation: From formula, \(\frac{I_1}{I_2}=(\frac{a_1}{a_2})^2=(\frac{1.5_{a_2}}{a_2})^2\) = (1.5)2 = 2.25
2 Answers 2 views