JEE Main 2019 Physics question

In a Young's double slit experiment with slit separation 0.1 mm, one observes a bright fringe at angle rad by using light of wavelength . When the light of wavelength is used a bright fringe is seen at the same angle in the same set up. Given that and are in visible range (380 nm to 740 nm), their values are:

• (A)400 nm, 500 nm
• (B)625 nm, 500 nmCorrect
• (C)380 nm, 500 nm
• (D)380 nm, 525 nm