Light reflection and refraction Worksheet-2
A. 1.33 B. 0.75 C. 0.707 D. 1.5
A. /2 B.
C. 1/ D. None of these
A. B. /2 C. 2/ D. 2
A. 10 cm B. 15 cm C. 5 cm D. 26.67 cm
A. real and inverted, v = 30 cm, h2 = –4.0 cm
B. Virtual and inverted, v = 30 cm, h2 = 4.0 cm
C. real and inverted, v = 15 cm, h2 = 4.0 cm
D. None of these
Here, speed of light in water, u = 2.25 × 108 m/s
Speed of light in vacuum, c = 3 × 108 m/s, refractive index n = ?
Here, angle of incidence i = 45° and angle of refraction, r = 30°
refractive index of medium 2 w.r.t. medium 1n2 = ?
According to Snell’s law,
Here, 2n1 = ?
Here, real depth of pond x = 20 cm
Refractive index of water
Apparent depth, y = ?
Given object size, h1 = 2.0 cm
Focal length of convex lens, f = 10 cm
Object distance, u = –15 cm
Image distance, v = ?
Image size h2 = ?
According to Lens formula
v = 30 cm
As v is positive, the image formed is on the right side of the lens. It must be real and inverted. Now
h2 = –4.0 cm
And m = –2
Negative sign of m and h2 show that the image is inverted.
Thus a real, inverted image enlarged 2 times (i.e. 4.0 cm tall) is formed at a distance of 30 cm on the right side of the lens.