Question 1. A concave mirror has a focal distance of 1.0 m. An object is located

Question

Question 1. A concave mirror has a focal distance of 1.0 m. An object is located 2.0 m in front of the mirror. Which statement(s) is(are) incorrect?

(A) image has a linear magnification of -1.0 and located in front of mirror

(B) image is inverted and located 2.0 m away from mirror

(C) image is upright and located 0.5 m in front of mirror

(D) image is real and located 2.0 m in front of mirror

Question 2. A beam of light travels in air and then enters water (n=1.33) at an angle of incidence of 30 degrees. Which statement(s) is(are) incorrect?

(A) light will experience total internal reflection

(B) the angle of reflection will depend on the wavelength of light

(C) the angle of refraction will be 35 degrees

(D) the angle of refraction will be smaller than 30 degrees

Question 3. Light of wavelength 500 nm is used in a double-slit interference experiment with a 0.5 mm slit separation and 1.0 m screen distance. Which statement(s) is(are) incorrect?

(A) one can use small angle approximation to find the location of the second-order (n=2) maximum

(B) linear separation between bright lines on the screen is 1.0 mm

(C) linear separation between dark lines on the screen is 0.5 mm

(D) the angle of the second-order maximum is independent of the screen distance

Explanation / Answer

1) ans is A

since object is kept at Centre of curvature, its image will always be real and at C only

2)D , since light enters from rarer to denser so it will bend towards normal.so less than angle i

3)C is coprrect

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